Aquarium Fish Welfare Standards | Animal Welfare Hub

Aquarium fish welfare is increasingly recognised as important, with standards for space, water quality and enrichment improving.

Key Facts

Public aquariums house tens of millions of fish globally across thousands of species
Many aquarium fish are still sourced from wild-caught populations, with associated welfare and conservation harms
Water quality including oxygen, temperature, pH and ammonia are primary welfare determinants
Tank size relative to fish swimming capacity significantly affects welfare and behaviour
Shoaling species kept alone or in insufficient numbers show stress behaviours
Environmental enrichment including substrate, hiding areas and current simulation improves welfare
Sustainable marine aquaculture for aquarium species is expanding and reduces wild capture

Welfare Considerations

Aquarium fish welfare has improved significantly as scientific understanding of fish sentience has advanced. However, standards remain highly variable between facilities. Space requirements, water quality, species-appropriate social groupings and enrichment are all critical welfare factors. Public aquariums have both a welfare responsibility to their fish and a public education role in demonstrating high welfare standards.

What You Can Do

Visit public aquariums accredited by organisations with welfare standards
Avoid purchasing wild-caught marine fish for home aquariums
Research species-specific needs thoroughly before purchasing any aquarium fish
Support aquariums that invest in sustainable aquaculture for their collections