When releasing the fish back into the water, doing so headfirst helps to expel this excess air. A fish that has been stressed can be revived by gently moving it forward to promote water flow over the gills. Once their tail enters the water, typically they have enough propulsion they need to survive and reach the greater depths again. Some anglers are trained in a technique called venting, which involves releasing the gas from an overinflated swim bladder with a hollow, sharpened steel-venting tool. This technique effectively releases pressure and allows the fish to overcome buoyancy problems. Anglers wishing to be trained in proper venting techniques should contact DNR at (843) 953-9300.