Ocean Literacy
Coral Resilience in Our Ecosystem
Tropical Tragedies and Reef Resilience
Picture yourself, snorkeling underneath crystal blue waters with tropical fish off the coast of a tropical island. Above you, the sun is shining with a slight breeze, and below you, is a beautiful ecosystem with every color of the rainbow. Besides being beautiful, coral is endangered. The top threat to coral reefs currently is climate change and global warming. In the evolutionary sense, it is unknown to what extent coral can adapt to the warming oceans (Császár et al., 2010). Unfortunately, the toll the Anthropocene has left is a concern for coral reefs due to their environmental sensitivity resulting in coral bleaching (Torda et al., 2017). Coral bleaching will occur if the temperatures rise only 1.5 degrees Celsius (Tropical corals , n.d.). Tropical coral reefs make up one percent of the ocean but help to support a quarter of the ocean making it a vital ecosystem (Tropical corals , n.d.).
The three major types of coral are fringing reefs, barrier reefs, and atolls. Fringing reefs grow in shallow waters and border a coast closely or can be separated by a narrow stretch of water (Goreau et al., 1979). As their name suggests, barrier reefs are on a coast but they tend to be parallel to a coast and farther away, perhaps the most famous one is Australia’s Great Barrier Reef. Finally, atolls are chains or rings of coral islands that are encompassing a lagoon, which many can be round on volcanic cones (Goreau et al., 1979).

The Anatomy of Coral and Coral Proteins
Corals are well-known for their bright coloration caused by fluorescent proteins which are found in four color types which include green, red, cyan, and a blue/purple non-fluorescent chromoprotein (Palmer et al., 2009). Fluorescent proteins are plentiful within anthozoans, which includes sea anemones, sea fans, corals, and sea pens (Palmer et al., 2009). Their proteins live in their calcium carbonate skeleton with an algae they used to create food called zooxanthellae which also helps to give them color (Palmer et al., 2009). Most coral live in a symbiotic relationship with zooxanthellae, as the algae is dependent on coral for a habitat and coral uses the algae for photosynthesis (US Department of Commerce, N. O. and A. A., n.d.). Zooxanthellae creates dissolved oxygen under normal conditions, but once there is any stress like thermal stress (like climate change), an increase of oxidative stress can be created in the host or the symbiont, resulting in coral expelling zooxanthellae, or coral bleaching (Palmer et al., 2009).
Is Coral Really Affected That Much?
The short answer is YES!
Coral Adaptations
Climate change has increased in the past 20 years, usually during El Nino Southern Oscillation which happens every two to seven years (Coles & Brown, 2003). During El Nino, the water warms and the normal conditions of cold, nutrient dense water that usually upwell stop or weaken resulting in fewer phytoplankton off the coast, resulting in more tropical species (US Department of Commerce, N. O.A. A. ,n.d.). La Nina or “a cold event”, pushes colder waters north into the Pacific Ocean, resulting in the southern United States being drier and flooding or heavy rains in Canada or the Pacific Northwest (US Department of Commerce, N. O.A. A.,n.d.). Since coral is very sensitive to temperature changes and once the seawater temperatures rise, coral bleaching can occur during El Nino’s warmer temperatures (Coral & Brown, 2003). Coral reefs prefer to live between 73° and 84° Fahrenheit though some can tolerate temperatures as low as 68° F and as high as 90° F (Coral Reef Alliance, n.d.) Unfortunately, while reporting ongoing temperature analysis, NASA’s Goddard Institute for Space Studies (GISS) stated the average global temperature has increased by at least 1.1 degree Celsius or 1.9 degree Fahrenheit since 1880 (NASA, 2020). Since 1975, it has occurred at approximately 0.15 to 0.20 °C (NASA. 2020).
Some corals have adapted to stressful conditions. For example, Acropora has experienced a rapid evolution of proteins that are responsible for interaction with the environment that appears to promote adaptive processes (Gittens et al., 2015). Acropora Hyacinthus is associated with protective proteins that have heat resistant and heat-shock proteins and antioxidant enzymes that are beneficial to them as well (Gittens et al., 2015). In response to the elevated levels, anthozoans (corals) have antioxidant enzymes, for example, superoxide dismutase that assist in catalyzing changing superoxide anion to water and hydrogen peroxide (Palmer et al., 2009). Corals need light for photosynthesis with zooxanthellae; however, there are some coral species that do not have zooxanthellae, for example Lopoholelia, a colonial branching coral, that lives in the deep, cold waters in Norway’s fjords that can tolerate lower salinities, lower temperatures, and great depths (Goreau et al., 1979).


Coral Survival
Coral is in desperate need of assistance and there are multiple options available.
Marine biologists and divers can take part in fragmentation of coral reefs to assist in growing the reefs. The three different types of coral restoration are coral gardening, larval seeding, and reef balls. Coral gardening is fragmentation to assist corals in growing asexually, growing a coral clone. The colonies will continue to be fragmented for further growth and cloned multiple times in underwater nurseries and transported to a reef ( Meesters et al., 2015).
Larval seeding is the process when large amounts of coral eggs and sperm are collected in the field with sexual fertilization or reproduction in the lab, resulting in coral growing a certain size before being transported to a reef (Meesters et al., 2015). Finally, reef balls are concrete structures that provide a design for protection for fish as well as a possible attachment for organisms like coral (Meesters et al., 2015).
In 2023, there was an unprecedented coral bleaching event in Florida which assisted NOAA in learning more about how to assist corals (NOAA confirms 4th global coral bleaching event | National Oceanic and Atmospheric Administration, 2024).

NOAA moved some of the corals to deeper waters and moved sunshades over some of the coral nurseries (NOAA confirms 4th global coral bleaching event | National Oceanic and Atmospheric Administration, 2024). Coral research is definitely necessary in order for coral survival. Some scientists are considering building coral reef resilience through scientific assisted evolution (Torda et al., 2017). In Australia, the Great Barrier Reef Foundation is growing cross-bred heat resistant corals as well as cryopreservation technologies to help save coral reefs (Restoring coral reefs,2024).
Some scientists are considering building coral reef resilience through scientific assisted evolution (Torda et al., 2017). In Australia, the Great Barrier Reef Foundation is growing cross-bred heat resistant corals as well as cryopreservation technologies to help save coral reefs (Restoring coral reefs,2024).

Why Should We Care? How Can We Help?
There are many benefits coral reefs provide protection and food for thousands of species of fish, but are also important for humans for tourism, livelihood, food, and protection (US Department of Commerce, N. O. and A. A, n.d.). Coral reefs are essential to the ecosystem but are being destroyed by multiple threats to them including climate change, ocean acidification, pollution, physical damage, overfishing, or coral harvesting (US EPA, 2017). While some coral species have been able to adapt in small ways there is still a lot that can be done, and ways that we can help, even if we are not near an ocean. For example, a way we can slow down climate change in the rising ocean temperatures is by reducing chemical fertilizers, properly disposing of trash, recycling, saving energy at home by using energy efficient devices, and being cautious when diving or snorkeling (US EPA, 2017).
There are many dive programs, education events, internships, or citizen science programs that are specifically related to coral, like the Coral Restoration Foundation (Coral restoration foundation | United States, n.d.).

But How Do I Know What Sunscreen To Pick?
At this time, it has become pretty common to hear the term “reef-safe sunscreen” or “mineral-based” sunscreen. But what does it really mean? There are no strict definitions or guidelines and when further researched, interesting results were undercovered. Hawaii and the Florida Keys have issued legislative bans on oxybenzone and octinoxate-containing sunscreen. However, the National Oceanic and Atmospheric Administration (or NOAA) would like stricter enforcement, noting that eight chemicals are toxic to coral but used in sunscreen.
When deciding which sunscreen to choose, you want to make sure it is healthy for coral reefs. Even if a sunscreen says “reef-friendly” there are still some ingredients to be aware of. Since legislation has not been passed in any of the United States for all of the chemicals, you may have to research a bit to find that perfect match! There are some organizations like Save The Reef and the Coral Restoration Foundation (Coral restoration foundation | united states. (n.d.) that have up to date information and examples of sunscreens that are reef safe. While it may be hard to remember the list of chemicals that pose a threat, the easiest way to remember is that you want to stay away from it is a small way we can help coral, even if we are landlocked.
Coral is in desperate need of assistance and even with adapting it still may not be able to survive the rising temperatures. Coral reefs are animals that are silently dying and without a voice, they need our help and assistance to be saved. It is our fault that they are being bleached, and in order to accelerate protection marine biologists are creating efforts to protect the oceans and help them to adapt to climate change. The detrimental effects of the anthropocene can be witnessed by the bleaching white corals or felt in the hot summer days that are no longer sustainable for coral reefs. Coral reefs have adapted slowly, but without assistance, it may be a rush against time to restore coral reefs in rising temperatures. So why should we care about coral reefs? The truth is that they are a beautiful animal in our oceans but that is not all. Coral contributes to biodiversity, tourism, coastal protection, food, and medicine to name a few. Now is the time to step forward and not only be in awe of them but help to insure the vital ecosystem thrives.

About the Author
Drew Vickers is a current graduate student with Project Dragonfly at Miami University in Oxford, Ohio studying conservation biology. Her current studies focus on engaging others about endangered species.
References Cited
- Alieva NO, Konzen KA, Field SF, Meleshkevitch EA, Hunt ME, Beltran-Ramirez V, et al. (2008) Diversity and Evolution of Coral Fluorescent Proteins. PLoS ONE 3(7): e2680. https://doi.org/10.1371/journal.pone.0002680
- Ben-Zvi, O., Wangpraseurt, D., Bronstein, O., Eyal, G., & Loya, Y. (2021). Photosynthesis and bio-optical properties of fluorescent mesophotic corals. Frontiers in Marine Science, 8, 651601. https://doi.org/10.3389/fmars.2021.651601
- Coles, S. L., & Brown, B. E. (2003). Coral bleaching—Capacity for acclimatization and adaptation. In Advances in Marine Biology (Vol. 46, pp. 183–223). Academic Press. https://doi.org/10.1016/S0065-2881(03)46004-5
- Coral Reef Alliance. (n.d.). Coral Reef Alliance. What do corals reefs need to survive? Retrieved December 1, 2024, from https://coral.org/en/coral-reefs-101/what-do-corals-reefs-need-to-survive/
- Coral restoration foundation | united states. (n.d.). CRF. Retrieved December 1, 2024, from https://www.coralrestoration.org
- Császár NBM, Ralph PJ, Frankham R, Berkelmans R, van Oppen MJH (2010). Estimating the Potential for Adaptation of Corals to Climate Warming. PLoS ONE 5(3): e9751. https://doi.org/10.1371/journal.pone.0009751
- Gittins, J. R., D’Angelo, C., Oswald, F., Edwards, R. J., & Wiedenmann, J. (2015). Fluorescent protein‐mediated colour polymorphism in reef corals: Multicopy genes extend the adaptation/acclimatization potential to variable light environments. Molecular Ecology, 24(2), 453–465. https://doi.org/10.1111/mec.13041
- Goreau, T. F., Goreau, N. I., & Goreau, T. J. (1979). Corals and Coral Reefs. Scientific American, 241(2), 124–137. http://www.jstor.org/stable/24965267
- Hochberg, E.J., Atkinson, M.J., Apprill, A. et al. Spectral reflectance of coral. Coral Reefs 23, 84–95 (2004). https://doi-org.proxy.lib.miamioh.edu/10.1007/s00338-003-0350-1
- Meesters, H. W. G., Smith, S. R., & Becking, L. E. (2015). A review of coral reef restoration techniques. https://edepot.wur.nl/333153
- NASA. (2020, January 29). NASA. World of change: Global temperatures. https://earthobservatory.nasa.gov/world-of-change/global-temperatures
- NOAA confirms 4th global coral bleaching event | National Oceanic and Atmospheric Administration. (2024, April 15). https://www.noaa.gov/news-release/noaa-confirms-4th-global-coral-bleaching-event
- Palmer, C. V., Modi, C. K., & Mydlarz, L. D. (2009). Coral fluorescent proteins as antioxidants. PLOS ONE, 4(10), e7298. https://doi.org/10.1371/journal.pone.0007298</li>
- Reef safe sunscreen guide | save the reef. (n.d.). Retrieved March 7, 2025, from https://savethereef.org/about-reef-save-sunscreen.html
- Restoring coral reefs. (2024, November 22). Great Barrier Reef Foundation. https://www.barrierreef.org/what-we-do/restoring-coral-reefs
- Torda, G., Donelson, J., Aranda, M. et al. Rapid adaptive responses to climate change in corals. Nature Clim Change 7, 627–636 (2017). https://doi.org/10.1038/nclimate3374
- Tropical corals – bioacid: Biological impacts of ocean acidification. (n.d.). Retrieved December 1, 2024, from https://www.bioacid.de/tropical-corals/?lang=en
- US Department of Commerce, N. O. and A. A. (n.d.). Coastal pollution tutorial: Noaa’s national ocean service education. Retrieved October 14, 2024, from https://oceanservice.noaa.gov/education/tutorial_corals/coral01_intro.html
- US Department of Commerce, N. O.A. A. (n.d.). What are el nino and la nina? Retrieved December 2, 2024, from https://oceanservice.noaa.gov/facts/ninonina.html
- US EPA, O. (2017, January 30). Threats to coral reefs [Overviews and Factsheets]. https://www.epa.gov/coral-reefs/threats-coral-reefs
Issue 130 - March2026
Meet Jacqueline Rosa, the March Cover Conservationist

Meet The Cover Conservationist is a recurring SEVENSEAS feature that spotlights inspiring and influential people working at the forefront of ocean conservation.
Beyond the research papers, campaigns, and headlines, this series offers a more personal look at the people behind the work, exploring what drives them, challenges them, and keeps them hopeful for the future of our ocean. If there’s a conservationist you’d love to see featured on a future cover, we invite you to submit a short nomination (around 250 words) to info@sevenseasmedia.org. We receive many outstanding submissions, and while not all can be selected for publication, each is carefully considered.
Below you’ll find the merciless interrogation designed to give readers insight into our conservationist’s professional journey and the human side of life in ocean conservation. We only ask fearlessly candid, no-holds-barred questions, so get ready for a brutally honest, nail-biting interview.
1. To get our readers acquainted, why don’t you tell us just a little about yourself, what motivates you and what you are working on.
Jacqueline: I’m a second-year master’s degree student in the University of Rhode Island’s Graduate School of Oceanography. My research focuses on water quality and aquaculture, specifically investigating how water quality and gear type affect oyster growth in Narragansett Bay, Rhode Island. This work is driven by my interest to collaborate with oyster farmers and conduct research that benefits the aquaculture industry.
2. What was the moment or influence that first pulled you toward ocean conservation? Tell us about that.
Jacqueline: During college, I spent a summer along the coast of Maine assisting with lobster and scallop research projects. That experience showed me how closely science, industry, and coastal communities are connected. Working on the waterfront and interacting directly with fishermen helped me see that ocean conservation isn’t just about ecosystems; it’s also about supporting the people and livelihoods that depend on them.
3. Was there a specific place, species, experience, mentor, job, or challenge that shaped your career path?
Jacqueline: My first job after earning my bachelor’s degree was on Catalina Island, California, where I worked as a marine science instructor. It was a dynamic, adventurous, and rewarding job, one that continues to impact me today. I learned how to be an educator, communicate science, adapt quickly, and find the fun in challenging moments.
4. How do science and storytelling intersect in your work?
Jacqueline: The water quality dataset from my project helps oyster farmers understand seasonal trends in Narragansett Bay. By pairing quantitative data with observations from oyster farmers, we can tell a more complete story about what works, guide future research, and strengthen Rhode Island’s aquaculture industry through collaboration.
5. What’s one misconception people often have about your field?
Jacqueline: One common misconception people have about oceanography is that it entails just being out on a boat conducting field work. A lot of the work happens behind a computer, analyzing data, writing, securing funding, and collaborating across disciplines. It’s an ever-changing balance of field, lab, and desk work.
6. What part of your work feels most urgent today?
Jacqueline: Continued collaboration feels especially urgent, specifically uplifting the voices of industry members, such as oyster farmers, to identify research questions that are most relevant and impactful.
7. What achievement are you most proud of, even if few people know about it?
Jacqueline: I decided to apply to graduate school nine years after earning my undergraduate degree. Leaving the workforce and returning to student life was a big shift, and I’m proud to have taken that step. While I’m older than many of my peers, I wouldn’t change my timeline. Professional (and personal) growth isn’t linear, and there are infinite ways to get to where you want to go.
8. What keeps you going when conservation feels overwhelming?
Jacqueline: Being in graduate school, I’m surrounded by a large community of people who are deeply motivated. Being surrounded by that energy and commitment helps me stay focused, and reminds me that change is possible, even when progress feels slow.
9. What’s something the public rarely sees about how conservation really works?
Jacqueline: One thing the public rarely sees is just how complex and unpredictable conservation science can be. There are countless variables, including weather, mechanical issues, staffing, and funding, that we navigate every day. Carrying out research often means constantly adjusting and getting creative.
10. What’s one hard truth about ocean conservation we need to face?
Jacqueline: Climate change and environmental stressors disproportionately impact marginalized and coastal communities. Their voices and needs are often overlooked, yet they are on the frontlines of these challenges. Effective conservation requires listening to these communities, gathering their perspectives, and developing real solutions that will protect future generations.
11. What advice would you give your younger self entering this field?
Jacqueline: Everyone around you has something to teach you. Take the time to listen, ask questions, and build genuine connections.
12. Where do you realistically hope your work will be in 5 to 10 years?
Jacqueline: While my master’s research is ending, I hope that future research in Rhode Island continues to expand and support sustainable aquaculture. I’d love to see more state funding for projects that benefit both oysters and kelp, stronger partnerships between researchers and industry, and initiatives such as an experimental aquaculture farm.
13. What innovation excites you most in ocean conservation?
Jacqueline: I’m excited to see how aquaculture can become more “climate-ready.” For example, breeding or selecting oyster strains that are resilient to warming waters and ocean acidification could help farmers adapt to changing conditions.
14. Ocean sunrise or sunset? Any reason why?
Jacqueline: Sunrise, preferably viewed from a surfboard.
15. If you could be any marine animal, what would you be?
Jacqueline: Humpback whale. You can’t beat the ability to echolocate.
16. Coffee or tea (or what else?) in the field?
Jacqueline: Matcha latte.
17. Most unexpected or interesting place your work has taken you?
Jacqueline: I led marine conservation programs in the Dominican Republic for a summer. We partnered with local nonprofits on coral and mangrove restoration. It was interesting to see conservation happening in a different context. I loved learning about different approaches and realizing how much we can share and learn from one another across communities and countries.
18. One book, film, or documentary everyone should experience?
Jacqueline: Blue Planet 1 and 2.
19. What does a perfect day off look like?
Jacqueline: A bike ride to the beach, body surfing in warm summer waves, and low tide sea glass hunting.
20. One word you associate with the future of the ocean?
Jacqueline: Collaboration.
Issue 130 - March2026
Beneath the War Zone, the Persian Gulf’s Marine Ecosystem Faces Its Next Great Test
Editor’s Note: Why We Are Featuring Iran Now
Iran is once again dominating headlines.
From widespread public demonstrations that surged across Iran in late 2025 into early this year, to the current escalation and the breaking of war, the country is being discussed globally in the context of politics, conflict, and human suffering. The loss of life and instability unfolding are real and devastating. Nothing in this feature is intended to diminish that reality.
But there is something else that often goes unspoken.
For years, inside and outside of environmental circles, people have quietly asked me a question. Sometimes with curiosity. Sometimes with hesitation. Sometimes almost with guilt.
“What is actually there?”
They were referring to biodiversity.
In today’s world, there is pressure to already know. When the breadth of human knowledge appears to sit at our fingertips, asking basic questions can feel uncomfortable. If a place overlaps with your professional field or your moral concern, you are expected to understand it fully.
Curiosity, however, should never carry shame.
At SEVENSEAS Media, we see questions as bridges. When a region becomes defined only by conflict, it becomes even more important to remember that it is also defined by landscapes, species, ecosystems, culture, and people who have lived in relationship with nature for millennia.
Iran is not only a geopolitical flashpoint. It is a country of vast mountain ranges, ancient forests, wetlands, deserts, coral communities, migratory flyways, and one of the most strategically significant marine corridors in the world. It sits at the intersection of terrestrial and marine biodiversity, connecting ecosystems across Central Asia, the Caucasus, the Arabian Peninsula, and the Indian Ocean.
It is home to coastal communities whose fishing traditions stretch back centuries, to wetlands that host migratory birds crossing continents, and to marine systems that sustain life far beyond their shorelines.
This feature has been in development for some time. In light of current events, we believe it is important to move forward thoughtfully and with care.
Education is not a distraction from suffering. It is part of long term resilience.
At SEVENSEAS Media, we promote education and peace across cultures and living in harmony with nature. We believe that understanding biodiversity can humanize places that are otherwise reduced to headlines. Conservation, at its best, transcends politics and builds shared responsibility for the natural world.
In the articles that follow, we explore the geography of Iran, its terrestrial biodiversity, its migratory importance, and its ocean and coastal ecosystems. We touch on traditional fishing cultures, current pressures, conservation challenges, and the organizations working to protect what remains.
As always, we are not here to simplify complexity. We are here to make space for informed curiosity and careful understanding.
In moments of conflict, it can feel easier to look away. We choose instead to look closer, and to recognize that ecological systems persist regardless of political borders.
This story is developing rapidly. Details may shift as the situation evolves. Last verified: March 3, 2026.

The headlines are dominated by oil prices, geopolitical brinkmanship, and military escalation. But below the waterline of the Persian Gulf, a quieter catastrophe is taking shape, one that will outlast any ceasefire.
The Persian Gulf is not the barren petrochemical corridor that its reputation might suggest. It is a semi-enclosed sea of roughly 241,000 square kilometres, averaging just 35 metres in depth, connected to the wider Indian Ocean only through the 56-kilometre-wide Strait of Hormuz. Within this shallow, hypersaline basin lives a marine community that has adapted to conditions most ocean species could not survive: summer surface temperatures regularly exceeding 35°C, salinity levels above 45 PSU, and winter cooling that can plunge below 18°C. The organisms that thrive here are not merely surviving. They are demonstrating resilience strategies that climate scientists around the world are studying with increasing urgency.
Approximately 60 species of reef-building coral have been documented in the Gulf, including the endemic Acropora arabensis, found nowhere else on Earth. These corals withstand water temperatures of up to 36°C, well beyond the 32°C threshold that triggers bleaching in most tropical reefs. Researchers have increasingly turned to Persian Gulf coral populations as living laboratories for understanding how reef organisms might adapt to a warming planet. The Gulf also supports the world’s second-largest population of dugongs, after northern Australia, with an estimated 7,500 individuals grazing on seagrass beds along the coasts of Qatar, Bahrain, the UAE, and Saudi Arabia. Over 700 species of fish, populations of hawksbill and green sea turtles, Indo-Pacific humpback dolphins, whale sharks, and migratory seabird colonies all depend on this ecosystem.
The Immediate Threats
The environmental risks now facing this ecosystem are layered and compounding.
Oil contamination is the most visible concern. At least three commercial tankers have been struck by projectiles, with one confirmed ablaze and producing thick plumes of black smoke near Omani waters. A burning tanker does not simply release crude oil; it generates a toxic cocktail of partially combusted hydrocarbons, heavy metals, and particulate matter that settles across surrounding waters. With more than 150 laden tankers now anchored in open Gulf waters, the risk of collision, grounding, or further military targeting grows with each passing day. The shallow depth of the Gulf, averaging just 36 metres, means that spilled oil reaches the seafloor and coastal habitats far more quickly than in open ocean environments.
The sinking of at least nine Iranian warships introduces a different category of pollution. Sunken military vessels carry bunker fuel, hydraulic oils, lubricants, and munitions, all of which corrode and leach into surrounding waters over years and decades. A 2023 IUCN brief estimated that globally, over 8,500 shipwrecks are at risk of leaking approximately six billion gallons of oil. The Persian Gulf’s warm, shallow conditions accelerate corrosion, meaning these newly sunken warships could begin releasing contaminants faster than wrecks in colder, deeper waters.
Underwater noise pollution from military operations, including sonar, detonations, and sustained engine activity from hundreds of anchored vessels, adds biological stress. Marine mammals such as dugongs and dolphins rely on acoustic communication for feeding, mating, and navigation. Prolonged noise disruption can displace populations from critical habitats, with consequences that persist long after the sound stops.
Reports of potential mine-laying by Iranian forces introduce yet another dimension. Naval mines are indiscriminate by design; they threaten not only vessels but also the seabed itself, disturbing sediment and destroying benthic habitats when detonated. GPS jamming, confirmed across the region, increases the likelihood of navigational accidents among the hundreds of ships now attempting to shelter in place.
History’s Warning
The Persian Gulf carries the scars of previous conflicts. During the 1991 Gulf War, an estimated 4 to 11 million barrels of crude oil were deliberately released into its waters, covering more than 600 kilometres of Saudi coastline. Research conducted by Jacqueline Michel in 2010 found that oil had penetrated up to 50 centimetres into Gulf sediments and remained detectable 12 years after the spill. A 2017 study by Joydas et al. found “alarming levels” of hydrocarbons persisting in secluded bay areas more than 25 years later. While fish and bird populations showed encouraging recovery by 1994, the long-term contamination of sediments and coastal habitats tells a more complicated story.
The Gulf ecosystem did recover from 1991, a testament to its remarkable resilience. But it recovered into a world with fewer stressors. Today, the same ecosystem faces compounding pressures from coastal development, desalination plant discharge, climate-driven temperature extremes, and chronic oil pollution from routine shipping. A 2024 review published in Marine Pollution Bulletin found that 63.5% of the Gulf’s key habitats and species remain “data-deficient,” while 21.2% show documented decline. The margin for absorbing another major environmental shock has narrowed considerably.
What Comes Next
The environmental consequences of this crisis will not be determined by the conflict’s duration alone, but by what happens when it ends. After 1991, clean-up efforts focused almost exclusively on oil recovery from the water’s surface, while coastal habitats were largely neglected. If history offers any instruction, it is that the environmental response must begin alongside the military and diplomatic response, not after it.
International bodies, including the Regional Organization for the Protection of the Marine Environment (ROPME) and the International Maritime Organization, will need to coordinate rapid environmental assessment once conditions allow. Monitoring of coral communities, seagrass beds, and dugong populations should be prioritized, alongside sediment sampling near tanker anchorage sites and sunken vessel locations.
The Persian Gulf’s marine life has survived environmental extremes that would have destroyed ecosystems elsewhere. It has endured the largest deliberate oil spill in history and emerged, battered but functional. Whether it can absorb another round of military trauma on top of everything the 21st century has already thrown at it is a question that marine scientists are watching with deep concern, and one that the rest of us should be paying attention to as well.
Written by: Junior Thanong Aiamkhophueng
Attribution: This article draws on marine biodiversity research published in Marine Pollution Bulletin (2024) on habitat status across the Persian Gulf; peer-reviewed ecological analysis from PMC on critical research needs for Gulf coral reef ecosystems (Feary et al., 2014); EBSCO Research’s overview of the Persian Gulf ecosystem including dugong populations and endemic coral species; the IUCN’s 2023 issues brief on marine pollution from sunken vessels; ScienceDirect review of habitat and organism status across six Gulf countries; gCaptain and Windward Maritime Intelligence reporting on vessel attacks and anchorage patterns; France 24 and Al Jazeera coverage of mine-laying risks and GPS jamming; historical oil spill research by Jacqueline Michel (2010) on sediment penetration and Joydas et al. (2017) on long-term hydrocarbon persistence; CNN’s 2010 retrospective on 1991 Gulf War oil spill recovery; Wikipedia’s compiled entry on the Gulf War oil spill; and Maritime Education’s profile of Persian Gulf marine habitats and biodiversity. Persian Gulf coral reef satellite image by NASA Earth Observatory. For further reading, visit the IUCN Marine Programme, the Regional Organization for the Protection of the Marine Environment (ROPME), and NASA Earth Observatory.
Aquacultures & Fisheries
Slowing Down to Save Whales Could Also Cut Shipping Emissions by Hundreds of Tonnes Per Voyage, White Paper Finds

The shipping industry has spent years debating how to cut emissions without overhauling entire fleets or waiting for next-generation fuels that remain decades from commercial viability. A white paper released March 2, 2026, by the Institute of Marine Engineering, Science and Technology (IMarEST) in collaboration with Montreal-based AI company Whale Seeker and True North Marine suggests the answer may already be hiding inside every vessel’s bridge controls: the throttle.
The paper, titled Navigating with Nature: How Smarter Ship Routing Delivers Emissions Cuts and Biodiversity Gains, models a transatlantic route from Montréal, Canada, to Le Havre, France, and integrates ecological sensitivity layers, habitat vulnerability indices, and speed optimization algorithms into the voyage planning process. The results, based on a single route simulation, are striking: modest speed adjustments along the transit could avoid approximately 198 tonnes of CO₂, cut underwater radiated noise exposure by more than 50%, and reduce the risk of a fatal whale strike by up to 86%. The optimized route also yielded fuel savings of 61.7 metric tonnes per crossing.
Those numbers deserve context. A single transatlantic voyage producing nearly 200 fewer tonnes of carbon dioxide is not a rounding error. Multiplied across the thousands of commercial transits that cross the North Atlantic each year, the cumulative reduction potential is enormous, and it requires no new vessel construction, no experimental fuels, and no regulatory overhaul. It requires information and willingness.
The white paper builds on a growing body of research showing that the relationship between vessel speed and whale mortality is not linear; it is exponential. Studies published in Scientific Reports and cited by NOAA Fisheries have consistently demonstrated that the probability of a fatal collision increases dramatically above 10 knots. For the critically endangered North Atlantic right whale, which numbers roughly 380 individuals and is the subject of an ongoing Unusual Mortality Event declared in 2017, vessel strikes remain one of the two leading causes of death alongside fishing gear entanglement. NOAA data shows that 42 right whales have died and 40 have been seriously injured since 2017, with the vast majority of those casualties traced to human interaction.
What the IMarEST paper adds to this picture is an economic case. The conventional framing positions whale protection and commercial efficiency as competing interests: slow your ship to save whales, and you lose time and money. The Navigating with Nature model flips that assumption. By integrating real-time ecological data into route planning, the optimized voyage actually saves fuel. The speed adjustments are not uniform reductions across the entire crossing; they are strategic, applied in areas of high ecological sensitivity where whale density, calving grounds, or migratory corridors overlap with the shipping lane. In lower-risk stretches, the vessel can maintain or even increase speed to compensate, keeping overall transit time within commercially acceptable margins.
“What this case study shows is that smarter speed choices could cut costs and emissions now, while also reducing underwater noise and pressure on ocean biodiversity,” said Emily Charry Tissier, CEO and co-founder of Whale Seeker. Charry Tissier, a biologist with two decades of experience in coastal and Arctic ecosystems, founded the company in 2018 to use AI and aerial detection for marine mammal monitoring. Whale Seeker’s technology has since been deployed with Transport Canada to detect right whales in real time in the St. Lawrence corridor.
The underwater noise dimension is worth pausing on. Chronic noise pollution from shipping is one of the least visible but most pervasive threats to marine mammals. Whales and dolphins rely on sound for communication, navigation, and foraging. Elevated background noise from vessel traffic can mask their vocalizations, disrupt feeding behavior, increase stress hormone levels, and in extreme cases cause physical injury. The International Maritime Organization has recognized underwater noise as a significant environmental concern, but regulatory action remains voluntary and unevenly implemented. A 50% reduction in noise exposure through route and speed optimization, as the white paper models, would represent a meaningful improvement for cetacean populations along one of the world’s busiest shipping corridors.
Alasdair Wishart, IMarEST’s technical and policy director, framed the paper in regulatory terms. “This white paper illustrates how the landscape could look for vessel owners and operators should there be further legislation to protect marine mammals,” he said. The subtext is clear: the shipping industry can either adopt these practices voluntarily and capture the fuel savings, or wait for governments to mandate them and lose the first-mover advantage.
The paper was endorsed by the United Nations Decade of Ocean Science for Sustainable Development and produced through IMarEST’s Marine Mammal Special Interest Group, a technical body composed of experts from academia, industry, policy, and government. Strategic framing was supported by Fürstenberg Maritime Advisory.
It is worth noting what the paper does not claim. This is a case study based on a single simulated route, not a fleet-wide operational trial. Real-world implementation would face challenges including schedule pressures, port congestion, contractual obligations, and variable weather. The authors position the work as a starting point for integrating biodiversity intelligence into routing decisions, not a finished policy prescription.
Still, the fundamental insight is hard to argue with. In an industry under intense pressure to decarbonize, the notion that protecting marine life and reducing fuel costs can be pursued simultaneously, rather than traded against each other, is a compelling proposition. The ocean’s largest animals and the industry’s bottom line, it turns out, may have more aligned interests than decades of regulatory debate have assumed.
Source: IMarEST, Whale Seeker, True North Marine | Published March 2, 2026
White paper: Navigating with Nature: How Smarter Ship Routing Delivers Emissions Cuts and Biodiversity Gains | Available at imarest.org
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We are the largest marine organisation of our kind and the first institute to bring together marine engineers, scientists and technologists into one international multi-disciplinary professional body.
We promote the scientific development of marine engineering, science and technology, providing opportunities for the exchange of ideas and practices and upholding the status, standards and knowledge of marine professionals worldwide.
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