Coral reef fish face welfare crises from reef degradation, destructive fishing practices, and the aquarium trade collection methods that cause mortality and stress.
Reef fish experience multiple welfare threats from reef degradation. Fish exposed to cyanide during collection are stunned but not killed - the chemical damages liver and other organs, causing delayed death in a significant proportion after purchase. Fish in acidified waters show altered brain chemistry that affects behavioral responses to predators - essentially reducing their ability to avoid harm. The loss of coral reef habitat eliminates shelter and food resources, forcing fish into suboptimal territory with higher predation risk. The cumulative welfare impacts across billions of individual fish are enormous.