The marine aquarium trade involves significant welfare harms through capture methods, transport, and captive conditions for coral reef fish.
Marine aquarium trade welfare harm operates at multiple stages. Cyanide fishing - the most commonly used capture method in several major supply regions - causes immediate organ damage, behavioral abnormalities, and delayed mortality that may not manifest until weeks after purchase. Transport mortality from capture sites through multiple transhipment stages to retail stores causes cumulative stress and death. The retail environment - with high-density holding and rapid turnover - adds further stress. Captive conditions in home aquaria frequently fail to meet complex needs for water quality, social structure, and territory that wild-caught reef fish require. The single most impactful consumer action is purchasing captive-bred fish where available and refusing to purchase wild-caught fish from regions with documented cyanide fishing.