Coral reef fish live in some of the world's most biodiverse ecosystems, now under severe threat from climate change and human activity. Their welfare is significant both individually and as part of the reef ecosystem.
Coral reef fish welfare is inseparable from reef ecosystem welfare - these animals have evolved specifically for reef environments that are now being destroyed. Individual welfare harms include cyanide fishing, which causes painful damage to internal organs even when it does not kill immediately; capture stress from reef fish destined for the aquarium trade; and the acute distress of reef bleaching events that strip away the habitat, food, and shelter fish depend on. The loss of coral reefs would eliminate the ecological context in which millions of fish species have meaning - a catastrophic welfare harm at ecosystem scale that demands urgent climate action alongside individual animal welfare protections.