Seahorses face significant welfare challenges in the aquarium trade, with poor survival rates in captivity and wild population pressure from collection and habitat loss.
Seahorse welfare in the aquarium trade reflects a pattern common in specialist marine species: the biological requirements for survival in captivity are poorly understood by casual purchasers, resulting in extremely high mortality of purchased animals. Wild-caught seahorses arrive in retail aquarium shops adapted to their specific natural diet of live mysid shrimp and amphipods; the transition to frozen food routinely used in aquaria causes starvation because seahorses have very poor food conversion when offered dead prey. Their slow, deliberate feeding method means they are outcompeted for food in community tanks. Survival times of weeks rather than months or years are the norm in home aquaria without specialist knowledge and equipment. The welfare calculation is stark: the vast majority of wild-caught seahorses sold into the aquarium trade die within months in conditions that cause progressive starvation and stress. Captive-bred seahorses from specialist facilities, trained to accept frozen food from birth, have much better welfare prospects in appropriate aquarium conditions. Demand reduction through consumer education and aquarium industry self-regulation would provide the most effective welfare improvement.