The home aquarium trade involves millions of wild-caught and captive-bred fish whose welfare depends heavily on owner knowledge, appropriate tank conditions, and responsible sourcing practices.
Aquarium fish welfare is shaped by a combination of owner knowledge deficits and industry practices that prioritize low cost over animal welfare. Common welfare failures include tanks far too small for the fish kept, inappropriate water chemistry, solitary housing of social species, and purchase of fish unlikely to survive in captivity. Wild collection for the marine ornamental trade involves significant mortality and sometimes cruel collection methods. Transitioning toward captive-bred marine species, improving keeper education, and establishing welfare standards in the ornamental trade would substantially reduce suffering in what is numerically one of the largest forms of companion animal keeping.