Aquatic Animals

Aquarium Fish Welfare

Aquarium fish are often kept in conditions that fail to meet their complex environmental, social, and behavioral needs.

Key Facts

The aquarium trade moves over 1 billion fish annually
Up to 80% of marine aquarium fish are wild-caught using cyanide
Fish can experience fear, pain, and chronic stress
Small, barren tanks prevent natural schooling and territorial behaviors
Many popular species require hundreds of liters to thrive

Welfare Considerations

Fish welfare is poorly understood by most hobbyists, who frequently underestimate tank size requirements and overestimate fish tolerance for suboptimal conditions. Chronic stress in fish manifests as color fading, reduced activity, fin clamping, and susceptibility to disease. The global scale of aquarium fish trade means small improvements in husbandry standards could have enormous welfare impact.

What You Can Do

Research species requirements before purchasing aquarium fish
Choose captive-bred fish over wild-caught whenever possible
Provide species-appropriate group sizes, substrate, and hiding spaces
Never release aquarium fish into natural waterways