Fish welfare in aquarium settings — from public aquariums to home tanks — raises important questions about environmental quality, handling stress, and the ethics of keeping highly mobile creatures in confined spaces.
Fish welfare in aquarium settings depends critically on whether environmental parameters match species needs. Many commonly kept species — clownfish, surgeon fish, tangs — are active, wide-ranging reef fish that are fundamentally mismatched with small, barren home tanks. Schooling species kept alone show abnormal behaviour. Water quality parameters outside optimal ranges cause chronic stress and immune suppression. The apparent simplicity of fish keeping — fish are often presented as low-maintenance pets — masks the complexity of providing genuinely good welfare for animals with sophisticated environmental requirements.