The Pre-Vent was invented, designed and developed to humanely, quickly and safely deflate the abdominal cavities of all reef fish. Much safer than a hypodermic needle, the Pre-Vent is the safest, best-built venting tool available. This simple-to-use tool has a comfortable ergonomic design, multiple venting positions, and a lifetime warranty. Do your part to increase the survival of reef fish, and use a Pre-Vent every time.