Catch and Release Fishing Welfare Science

The welfare of fish caught and released is increasingly scrutinised as evidence of fish pain and stress capacity grows, challenging assumptions behind recreational angling.

Key Facts

Physiological stress responses in hooked fish include cortisol elevation, lactic acid build-up, and oxygen debt
Barotrauma from rapid pressure changes affects deep-water fish returned to the surface
Hook injury and air exposure both worsen post-release survival rates
Barbless hooks and wet-hand handling can improve survival outcomes in released fish
Studies show some species recover well from catch and release; others have significantly elevated mortality

Welfare Considerations

Catch and release fishing is widely practiced on the assumption that it is welfare-neutral — that released fish recover and swim away unharmed. The science tells a more nuanced story. Fish respond to hooking with clear physiological stress responses, and while many individuals do recover, post-release mortality is real and influenced by handling time, air exposure, water temperature, and species. There is scientific consensus that fish are capable of experiencing pain, which means the welfare implications of catch and release deserve honest examination rather than dismissal. Welfare-conscious anglers can substantially improve outcomes through species-appropriate techniques: barbless hooks, minimising fight time, keeping fish in water, and following evidence-based handling guidelines.

What You Can Do

Use barbless hooks when practicing catch and release to reduce hook injury
Minimise fight time and handle fish with wet hands to reduce stress and skin damage
Avoid lifting fish clear of water — keep them submerged or limit air exposure to seconds
Research species-specific catch and release mortality before targeting particular fish
Support research into angling techniques that minimise fish welfare costs