Bring 'em up, put 'em back - gently: lake trout
Proper catch and release of lake trout
Anglers often enjoy the live release of fish they have caught. However, the successful release of coldwater species such as lake trout from deep water can present challenges. Bringing a lake trout to the surface from depths of 200 feet or more can be stressful as the fish experiences a substantial reduction in water pressure. As the water pressure decreases the swim bladder will expand – bloating the fish and causing barotrauma if the pressure is not released. A fish that is in this condition will not be able to descend and will be exposed to warmer surface water temperatures and predators such as gulls.