Coral Reef Welfare: Climate Bleaching and the Marine Animals That Depend on Them

Coral reef decline driven by climate change represents a catastrophic welfare crisis for millions of marine species.

Key Facts

Coral reefs support 25 percent of all marine species despite covering less than 1 percent of the ocean floor
Mass bleaching events have affected the Great Barrier Reef in 2016, 2017, 2020, and 2022
Half of the worlds coral reefs have been lost since the 1950s
Reefs provide food and livelihoods for around 500 million people globally
Coral bleaching occurs when water temperatures rise just 1 to 2 degrees above summer maximums

Welfare Considerations

Coral reef decline creates welfare harm at multiple levels. Fish and invertebrates that depend on reef structure lose habitat and shelter. Predator-prey dynamics are disrupted as structural complexity is lost. Mass bleaching events cause direct death of coral polyps which are animals not plants. The cascade effects on fish populations cause starvation and population collapse. Reef fish are sentient animals whose welfare is affected by ecosystem collapse on a massive scale.

What You Can Do

Support climate policy that limits warming to 1.5 degrees Celsius to protect remaining reefs
Donate to Australian Institute of Marine Science reef monitoring and restoration research
Choose sustainable seafood that does not devastate fish populations on reefs
Support coral reef restoration projects including heat-tolerant coral breeding programmes
Reduce personal carbon footprint and advocate for systemic climate policy change