Aquatic Animals

Aquarium Fish Welfare Standards

Millions of fish are kept in home aquaria, and welfare standards for transport, stocking, and environmental conditions significantly impact their wellbeing.

Key Facts

An estimated 700 million fish are kept in home aquaria globally
Approximately 90% of freshwater aquarium fish are captive bred, compared to only 5% of marine species
Marine fish collection using cyanide is widespread in Southeast Asia and damages reefs and fish health
Poor water quality is the leading cause of aquarium fish morbidity and mortality
Evidence suggests fish are sentient and capable of experiencing pain and stress

Welfare Considerations

Fish suffer from poor water quality, inappropriate social conditions, and stress from overcrowding, aggressive tankmates, or inadequate hiding places. Cyanide-caught marine fish may suffer internal organ damage and have reduced lifespans in captivity. Many fish die within weeks of purchase due to inadequate care or unsuitable conditions. Improving standards for fish transport, retail care, and owner education reduces the scale of preventable fish suffering.

What You Can Do

Research fish care requirements thoroughly before purchasing any species
Choose only captive-bred fish where possible, particularly for marine aquaria
Test water quality regularly and maintain appropriate temperature, pH, and filtration
Ensure tank size is appropriate for adult fish size, not juvenile dimensions
Avoid purchasing fish that are unlikely to adapt to captivity or are known to have short captive lifespans