Trout catch and release fishing is popular in many regions but fish welfare depends critically on water temperature, handling time, and hook type that anglers should understand and apply.
Trout welfare in catch and release fishing is acutely sensitive to water temperature because warm water both stresses fish physiologically and reduces dissolved oxygen available for recovery. High-temperature catch and release is not a welfare-neutral conservation tool but causes significant mortality and suffering. Anglers committed to trout welfare should monitor water temperatures and voluntarily refrain from fishing when temperatures exceed welfare thresholds. When fishing is appropriate, best practice minimizes air exposure, uses appropriate tackle, and ensures adequate revival. Regulatory frameworks supporting voluntary and mandatory temperature-based restrictions protect both fish welfare and fish population sustainability.