Environmental enrichment for farmed fish is an emerging welfare area demonstrating that fish benefit from behavioral opportunities beyond bare tank conditions.
Fish enrichment research is demonstrating that farmed fish benefit from environmental complexity in ways analogous to terrestrial farm animals. Tanks and sea cages are typically bare environments that provide no behavioral opportunity beyond swimming in circles. Adding substrate, objects, current variation, and foraging challenges increases behavioral diversity and reduces the aggression associated with boredom and frustration. The welfare improvement is measurable through reduced fin damage, lower cortisol, and better growth in some studies. Implementation challenges include hygiene in enclosed systems and cost, but simple enrichment approaches can provide meaningful welfare benefits at low expense. Consumer demand for welfare-certified fish can drive adoption.