Coral reef fish inhabit some of the world's most biodiverse ecosystems. Their welfare is impacted by reef degradation, collection for the aquarium trade, and climate change — an emerging area of welfare concern.
Reef fish welfare encompasses multiple overlapping pressures. The ornamental trade causes acute welfare harm through capture methods, transport stress, and high mortality rates; a fish that survives capture and reaches an aquarium has passed through multiple welfare-compromising stages. Climate-driven reef degradation causes chronic habitat loss welfare harms — fish displaced from bleached reefs experience food insecurity, increased predation risk, and failed breeding. The welfare case for reef conservation is therefore both direct — protecting fish welfare — and indirect — maintaining the ecosystems that support fish welfare at scale. Consumer choices about aquarium fish, coral-safe sunscreen, and seafood sourcing all connect to reef fish welfare through the mechanisms of reef health and trade volume.