Millions of coral reef fish are collected for the aquarium trade using cyanide poisoning, causing mass mortality and welfare harms.
Cyanide poisoning causes acute cellular toxicity, organ damage, and delayed mortality. Fish surviving initial capture experience transport stress, exposure to fresh water (which removes skin mucus), inappropriate salinity, and incompatible tank mates. Most aquarium fish have complex social and spatial needs that cannot be met in home tanks. Mortality rates are extremely high.