Seahorses are unusual marine animals with highly specialised feeding, social and reproductive needs that make them both fascinating exhibit species and challenging welfare subjects in aquarium settings.
Seahorse welfare is compromised at multiple levels in captivity. Their extreme feeding requirements — multiple small meals daily of appropriate-sized live or frozen prey — demand substantial keeper investment that is often inadequate in busy aquarium settings. Hunger is a chronic welfare issue in undersupported exhibits. Their reliance on anchoring structures means barren exhibits cause physical distress — unable to grip, seahorses exhaust themselves fighting water currents. Competition with tankmates for food in mixed-species exhibits systematically disadvantages seahorses who cannot move quickly enough to compete. Wild-caught seahorses experience severe stress from capture, transport and captive introduction — mortality within the first weeks is very high. The traditional medicine trade drives massive wild capture, creating suffering at enormous scale. Captive breeding programmes by specialist breeders and accredited aquariums produce significantly more welfare-positive animals adapted to captive feeding, but demand from the trade far exceeds captive production capacity.