Aquarium fish are sentient animals capable of experiencing pain, stress, and positive states. Creating genuinely species-appropriate environments requires moving beyond minimal survival to active welfare promotion.
Aquarium fishkeeping has historically been framed entirely around human enjoyment with little consideration of fish welfare. Fish are now understood to be sentient animals with capacities for pain, stress, and potentially positive emotional states. Common fishkeeping practices frequently compromise welfare: inappropriate tank sizes, incompatible species combinations, poor water quality, and inadequate environmental complexity. The aquarium fish trade involves significant mortality - most wild-caught fish die before reaching the aquarium. A welfare-centered approach to fishkeeping asks what the fish needs to thrive, not just survive, and designs environments around that question rather than convenience or aesthetics.