Freshwater Fish Welfare in the UK

UK freshwater fish face welfare threats from pollution, habitat degradation, abstraction, and the welfare implications of catch-and-release angling.

Key Facts

Over 50 freshwater fish species are native to UK rivers and lakes
Water abstraction during dry summers has caused fish deaths in many UK rivers
The River Wye experienced mass fish mortality from agricultural pollution in 2022
Catch-and-release angling affects fish welfare with outcomes depending on handling methods
Anaemia, skin damage, and physiological stress from handling last several hours after release

Welfare Considerations

Freshwater fish face multiple welfare challenges from human activity. Pollution events cause acute suffering and mass mortality. Low water levels from abstraction concentrate fish and reduce oxygen, causing chronic stress. Catch-and-release angling, while preserving population levels, causes acute physiological stress and can cause death if fish are handled incorrectly. Best practice including wet hands, barbless hooks, and minimal air exposure reduces but does not eliminate welfare impact.

What You Can Do

Support the Wild Trout Trust and rivers trusts working to improve freshwater habitats
Advocate for adequate environmental flow requirements for UK rivers
Practice best-practice catch-and-release technique including wet hands and rapid return
Report fish kills and pollution events to the Environment Agency
Reduce phosphorus and nitrate contributions to waterways through garden and household management