Coral reef fish represent some of the most diverse and ecologically complex fish communities on Earth, and face mounting welfare threats from bleaching events, destructive fishing practices, and ocean acidification that cause mass mortality and chronic stress.
The welfare of coral reef fish is under assault from multiple directions simultaneously. Mass bleaching events cause sudden habitat loss, forcing fish into unfamiliar, less productive environments where food scarcity and predation pressure increase dramatically. Fish caught using cyanide suffer internal damage and high post-capture mortality but may appear alive during sale. The cumulative stress of living in degrading reef systems — with reduced food, shelter, and normal social structures — likely causes chronic negative welfare states in surviving fish. The scale of mortality from bleaching events alone is immense; the 2016 mass bleaching event killed an estimated 30% of the coral on the Great Barrier Reef, with cascading mortality for the fish communities that depended on it.