The ornamental fish trade involves millions of marine and freshwater fish globally, with significant welfare losses during capture, transport, and captive keeping.
The ornamental fish trade generates enormous suffering that is largely invisible to the consumer who sees only a healthy-looking fish in a pet store tank. Wild collection using cyanide stunning is illegal but widespread in some source regions, causing liver damage that produces delayed mortality weeks after purchase. Transport involves crowded, oxygen-depleted conditions. Retail holding may be at inappropriate temperatures or densities. And consumer keeping in small, barren aquaria without species-appropriate conditions continues the welfare compromise. The contrast with freshwater ornamental fish — predominantly captive-bred, with shorter supply chains and established collection practices — demonstrates that a more welfare-conscious trade is achievable. Consumer choice to purchase captive-bred species from certified suppliers creates market incentives for improvement.