Taiwan Marine Ecology

On July 17, 2024, marine biologist Chen Chao-lun discovered a shocking sight at the Kenting Nuclear Power Plant's outflow area: 80% of corals had bleached white. This figure, more severe than the massive coral bleaching of 2020, signals that Taiwan's waters face an unprecedented ecological crisis. Meanwhile, 180 kilometers away on Lanyu Island, the Tao people continue following their ancestors' wisdom—observing flying fish season taboos where women cannot touch fishing boats and specific fish species are forbidden during certain months. On one side, millennia-old ecological wisdom; on the other, a marine catastrophe brought by modernization.

📊 Data Sources
Taiwan's marine territory covers approximately 180,000 square kilometers—five times larger than its land area. These waters host over 3,000 fish species, 380 coral species, and 38 cetacean species (about one-third of global cetacean diversity). However, under climate change impacts, coral bleaching frequency has shortened from "once per decade" to "less than every five years."

Why This Matters

Taiwan is not just an island—it's the most critical marine biodiversity hotspot in the western Pacific. The Kuroshio Current brings not only fish resources but also the warm current system that maintains East Asian climate stability. The Tao flying fish culture, humpback dolphin migration corridors, and the world's northernmost coral reefs are all facing unprecedented threats simultaneously. The 2024 global mass coral bleaching event hit Taiwan first. This is not just an environmental issue, but a crossroads of cultural survival and economic development.

Kuroshio: Taiwan's Blue Lifeline

A Current Stronger Than 200 Yangtze Rivers

The Kuroshio Current is the western Pacific's most powerful warm current system, flowing at up to 5 km/hour with a volume equivalent to 200 Yangtze Rivers combined. Flowing northward from the southeastern Philippines along Taiwan's east coast, it brings not just warm water but the foundation of the entire ecosystem.

Kuroshio's Ecological Contributions:

• Climate Regulator: Keeps Taiwan 2-3°C warmer than same-latitude regions in winter
• Nutrient Conveyor: Delivers approximately 3.5 million tons of fish resources annually
• Migration Corridor: Critical pathway for tuna, marlin, and cetaceans
• Upwelling Generator: Promotes plankton growth, forming the food chain base

💡 Did You Know
The Kuroshio's influence on Taiwan's eastern waters extends 500 meters deep. Off Hualien, you can see the distinct "blue-green boundary"—the Kuroshio's deep blue waters contrasting sharply with the coastal shallow green waters, creating what marine scientists call the "Kuroshio front."

Paradise for Migratory Fish

The Kuroshio serves as the western Pacific's "marine highway" for migratory species. Every year from March to June, flying fish ride the current north to Lanyu; July to September sees skipjack tuna passing Taiwan's eastern waters; October to December marks marlin spawning season. This precise biological clock supports Taiwan's coastal fisheries and marine tourism industries.

But climate change is altering the Kuroshio's trajectory. Ocean warming makes the current's position unstable and flow velocity slower, directly affecting migratory fish routes. Fishermen increasingly find that previously clock-accurate fish arrivals have become unpredictable.

Coral Reefs' Lament

From Once Per Decade to Less Than Every Five Years

Taiwan's coral reefs distributed around Kenting, Green Island, Lanyu, and Xiaoliuqiu represent the world's northernmost coral reef systems. But since the 1998 El Niño caused the first massive coral bleaching, disaster frequency is accelerating: 2010, 2020, and now 2024.

⚠️ Controversial Perspective
In July 2024, 80% of corals bleached at the Nuclear Power Plant No. 3 outflow area—more severe than 2020's 60%. The plant's thermal discharge raises local water temperature 2°C above surrounding environments, making it a coral bleaching "early warning station." This raises controversy: Are nuclear plants helping scientists forecast early warnings, or exacerbating ecological crises?

Xiaoliuqiu's Repeated Tragedy

Xiaoliuqiu, Taiwan's only coral reef island, suffered another devastating blow in 2024. Diving instructor Su Huai recorded heartbreaking footage: from branching Acropora to massive Porites corals, even soft corals—none were spared. More cruelly, corals that survived 2020's bleaching hadn't fully recovered before facing another life-or-death trial in 2024.

Dongsha Atoll's Double Blow:

• 1998 El Niño: 90% coral bleaching mortality
• 2024: After 20+ years of recovery, facing high temperature stress again
• Additional threat: Crown-of-thorns starfish outbreak, consuming 357-478 sq cm of coral daily

White Dolphins' Last Struggle

A Critically Endangered Species with Fewer Than 60 Individuals

The Taiwan humpback dolphin (Sousa chinensis taiwanensis), also known as Taiwan pink dolphins, ranks among Earth's most endangered marine mammals. According to International Union for Conservation of Nature (IUCN) assessment, the global population numbers fewer than 60 individuals, listed as Critically Endangered—just one step from extinction in the wild.

These dolphins inhabit a 763-square-kilometer area along Taiwan's west coast from Miaoli to Tainan, but this critical habitat overlaps with Taiwan's economic development core: Changbin Industrial Zone, Taichung Port, and offshore wind zones.

📝 Curator's Note
The government designated the "Humpback Dolphin Wildlife Important Habitat" in 2009, but this protected area's establishment, in some sense, is "marking a graveyard" for white dolphins—they've already been compressed with nowhere to escape.

The Perfect Storm of Human Activities

Taiwan's white dolphins face threats forming a "perfect storm":

Ironically, offshore wind farms built to combat climate change may be accelerating Taiwan white dolphins' extinction.

Tao People's Ecological Wisdom

Scientific Principles Behind Taboos

On Lanyu Island, the Tao people have followed complex marine taboo systems for millennia. These seemingly superstitious rules actually constitute a sophisticated ecological management system:

Flying Fish Season Timing (Rayon):

• Fish-Calling Season (March-April): Flying fish migration arrival
• Harvest Season (April-June): Intensive catching allowed
• Final Consumption (July-September): Eating previously dried flying fish
• Fish Resting Season (October-February): Fishing banned for reproduction

Ecological Logic of Fish-Eating Taboos:
The Tao classify fish into "good fish" (oyad, women's fish) and "bad fish" (rahet, men's fish). Good fish are easily frightened and hard to catch; bad fish move slowly and easily take bait. This classification system cleverly protects species vulnerable to overfishing.

💡 Did You Know
Tao flying fish season taboos have scientific basis: March-August is exactly the reproductive period for Taiwan's reef fish species. While Tao men focus on catching migratory flying fish, reef fish get to rest and recuperate, achieving ecological sustainability.

The Legend of Black-Winged Flying Fish

Tao flying fish culture originates from the "Black-Winged Flying Fish" legend. According to tradition, the flying fish chief taught the Tao people that different flying fish species require different catching methods and consumption rules, with strict regulations even for butchering techniques.

Modern science confirms these traditional wisdoms' correctness:

• Flying fish cannot be cooked with other fish or shellfish (prevents uneven cooking)
• Separate raw and cooked food handling (prevents cross-contamination)
• Flying fish eyes and bile consumed raw (preserves nutritional value)
• Fish roe must be cooked (eliminates pathogens)

But with modern technology's intrusion, these taboos are disappearing. Refrigerators made the tradition of "discarding remaining flying fish after the final feast" seem wasteful; motorboats replaced traditional plank boats, causing related taboos to be forgotten; young people pursuing flavor variety no longer follow traditional cooking methods.

Ocean Warming's Chain Reaction

2024: A Global Year of Coral Bleaching

2024 is called the "global year of coral bleaching" by marine scientists. The U.S. National Oceanic and Atmospheric Administration (NOAA) added three new coral bleaching alert levels this year, expanding from five to eight levels—meaning existing warning systems can no longer cope with rapidly deteriorating marine environments.

Taiwan Waters' Alert Status:

• Southern waters (Kenting, Xiaoliuqiu, Dongsha): Level 2 alert
• Northern waters: Level 1 alert
• Water temperatures reaching coral bleaching threshold: 30°C+ for several weeks

Adding Insult to Injury: Biological Invasions

High temperatures weaken corals, but the real deadly threats come from biological invaders:

White Snail Outbreak:

• Gastropods specializing in eating coral surface tissue
• At 30°C water temperature, consuming 1.3 sq cm of live coral daily
• 4.3 times their feeding rate at 18°C water temperature

Crown-of-Thorns Starfish Disaster:

• Adults consuming 357-478 sq cm of coral daily
• Releasing nearly 300 million eggs annually
• Even with only 1% survival rate, over a million juveniles result

⚠️ Controversial Perspective
The relationship between crown-of-thorns starfish outbreaks and climate change requires further scientific clarification. But one thing is certain: ocean warming is disrupting entire ecosystem balance, causing natural predator-prey relationships to spiral out of control.

The Offshore Wind Dilemma

Saving Climate vs. Harming Oceans

Taiwan's offshore wind development goals are ambitious: 5.7GW by 2025, 15GW by 2035. But this green energy program designed to combat climate change may cause irreversible damage to marine ecosystems.

Offshore Wind's Marine Impacts:

Humpback Dolphin Migration Corridors

Offshore wind's most controversial impact involves threats to humpback dolphins. While the government reserved "white dolphin migration corridors," scientific communities fiercely debate whether these corridors' width and location are sufficient.

Positive Impacts vs. Negative Consequences:

✅ Potential Benefits:

• Artificial reef effect: turbine foundations attract fish aggregation
• No-fishing zone effect: reduces trawling disturbance
• Carbon emission reduction: long-term marine environment improvement

❌ Confirmed Harms:

• Construction noise causing acoustic trauma to cetaceans
• Bird migration route disruption
• Ocean current pattern changes

📝 Curator's Note
This represents Taiwan marine conservation's ultimate irony: green energy facilities built to save Earth's climate may be killing Taiwan's most precious marine life. We're racing against time—will white dolphins go extinct before climate disasters arrive?

From Ancient Wisdom to Modern Science

Taiwan's Contribution to Marine Science

Taiwan's marine research holds important international standing, particularly in coral reef ecology and Kuroshio studies:

Major Research Institutions:

• Academia Sinica Biodiversity Research Center: coral bleaching mechanisms
• National Museum of Marine Science & Technology: marine education outreach
• National Sun Yat-sen University Marine Science College: Kuroshio physical properties

Breakthrough Discoveries:

• Molecular mechanisms of coral high-temperature adaptation
• Kuroshio pathway changes' climate impacts
• Ocean acidification effects on shell-forming organisms

Citizen Science Power

Taiwan developed unique "citizen science" marine conservation models:

Reef Check Taiwan:

• Volunteer divers conducting underwater ecological surveys
• Building long-term monitoring databases
• Early detection of ecological changes

Cetacean Sighting Network:

• Fishermen and crew reporting real-time cetacean locations
• Creating marine mammal distribution maps
• Helping vessels avoid sensitive areas

Taiwan's Marine Conservation Model

Community Participation vs. Government Regulation

Taiwan marine conservation developed unique "community participation" models, combining traditional ecological knowledge with modern scientific management:

Success Stories:

• Xiaoliuqiu green turtle conservation: from tourism threat to conservation model
• Lanyu flying fish culture revival: combining eco-tourism with cultural preservation
• Penghu stone weir restoration: ancient fishing methods' modern value

Challenges and Limitations:

• Economic development vs. conservation conflicts
• Central policy vs. local needs gaps
• Climate change exceeding local conservation capacity

Marine Protected Areas' Effectiveness

Taiwan's marine protected area system covers different levels:

But protected area designation is only the first step. The greater challenge is maintaining these areas' ecological functions under climate change impacts.

The Future: Adaptation or Resistance?

Four Destinies for Corals

Facing continuously warming waters, corals have only four choices:

1. Death: Unable to adapt to high temperatures, dying from bleaching
2. Acclimatization: Short-term physiological adjustments
3. Adaptation: Genetic mutations producing heat resistance
4. Migration: Moving to more suitable waters

Taiwan's corals are already evolving: Kenting Nuclear Plant outflow originally dominated by branching corals has been replaced by more heat-tolerant encrusting species. But if even "heat-resistant corals" cannot endure, Taiwan coral reefs' future remains highly uncertain.

Ocean Acidification's Hidden Threat

Besides temperature rise, ocean acidification presents another enormous threat. Increased atmospheric CO₂ concentrations cause seawater pH decline, making it difficult for shell-forming organisms (mollusks, corals) to build calcium carbonate skeletons. This "climate change's evil twin" is fundamentally altering marine chemistry.

✦ "We are conducting an unprecedented ocean chemistry experiment, with Earth's most precious ecosystems as our test subjects."

Redefining the Relationship Between Humans and Oceans

Standing at 2024's temporal vantage point, Taiwan marine ecology's story reflects human civilization's contradictions: on one side, millennia of Tao wisdom harmoniously coexisting with oceans; on the other, unprecedented destructive power from modern technology. Coral bleaching frequency shortened from decades to under five years, humpback dolphin populations below 60 individuals, offshore wind vs. marine conservation dilemmas—every number represents a disappearing world.

But this isn't a story of despair. Taiwan marine scientists are unlocking coral adaptation mechanisms; citizen scientists document every ecological change with underwater cameras; young Tao people are relearning their ancestors' ocean knowledge.

📝 Curator's Note
Perhaps the real answer lies not in choosing between ancient wisdom or modern technology, but in redefining humanity's relationship with oceans. When Black-Winged Flying Fish legends meet satellite monitoring systems, when flying fish season taboos combine with marine protected area management, we might discover this blue planet's sustainability code.

Taiwan's waters mirror the western Pacific and serve as a frontline post for global marine crises. In these 180,000 square kilometers of blue territory, we're writing the next chapter of human-ocean relationships. Whether it's a disaster's final chapter or rebirth's prelude depends on how we respond to this era's most urgent challenges.

References

• Academia Sinica Biodiversity Research Center - Coral Bleaching Research
• Ocean Conservation Administration - Taiwan Marine Ecological Surveys
• Our Island - 2024 High Temperatures Sound Coral Bleaching Alarm Again
• NOAA Coral Reef Watch - East Asia Regional Monitoring
• PanSci - Science Behind Tao Fish-Eating Taboos
• Taiwan Sousa Conservation Alliance
• IUCN Red List - Humpback Dolphin Assessment
• Taiwan Oceanographic Information Portal
• Offshore Wind Environmental Monitoring Platform