The aquarium hobby involves hundreds of millions of fish globally — but welfare standards for their capture, transport, and keeping remain poorly developed and inconsistently applied.
The aquarium hobby provides genuine joy to millions of people and can contribute to conservation awareness and appreciation for aquatic life. But the welfare costs embedded in the supply chain and in typical keeping practices are significant and largely invisible to hobbyists. Marine fish captured using cyanide stunners suffer chemical injury; fish surviving the supply chain often arrive in weakened condition; and even healthy fish in home aquariums frequently live in tanks that are too small, poorly filtered, or stocked with incompatible species. Improving aquarium fish welfare requires better trade regulation, promotion of captive-bred species, honest minimum tank size information, and hobbyist education about species-appropriate care.