Wild Coral Reef Ecosystem Welfare and Marine Biodiversity

Coral reefs support some of the most biodiverse marine ecosystems on Earth. Their decline causes welfare harm to billions of individual animals that depend on reef habitats.

Key Facts

Coral reefs cover less than 1% of the ocean floor but support 25% of all marine species
Over 50% of the world coral reefs have been lost since the 1950s due to bleaching and pollution
Coral bleaching events cause mass mortality of fish and invertebrates dependent on reef structure
Crown-of-thorns starfish outbreaks, partly driven by agricultural runoff, devastate reef ecosystems
Fish on degraded reefs show reduced foraging success and increased predation vulnerability
Reef restoration through coral gardening and larval seeding is expanding as a conservation tool

Welfare Considerations

Coral reef degradation affects the welfare of enormous numbers of individual marine animals. Fish that lose their structural habitat are more vulnerable to predation and less able to meet nutritional needs. Invertebrates dependent on coral structure face habitat loss and physiological stress from warming and acidified water. Climate action, improved agricultural runoff management, and sustainable fishing are the primary levers for protecting reef welfare at scale.

What You Can Do

Reduce carbon footprint through dietary, transport, and energy choices to protect reef temperatures
Use reef-safe sunscreen when swimming in reef environments
Support sustainable seafood choices to reduce pressure on reef fish populations
Donate to reef restoration and monitoring organisations
Advocate for agricultural runoff controls to reduce fertiliser pollution in reef catchments