If you poke a hole in the Bladder of any fish it dies. Dont poke a hole in them never. Do your homework guys. This is what the LSU Ag Department says about bladders this is on a red snapper but it dont matter all fish breathe the same way if it has gills.{Red snappers are a heavily regulated species with a relatively
large minimum size. Undersized fish must be released, often to the distress of fishermen. Many of the red snapper caught, especially from deeper waters, have their stomachs protruding from their mouths, forced there by the expansion of gases in the air bladder as the fish are brought to the surface. Most fishermen assume that all of the fish released in such condition will die. Research indicates that, unless another bigger fish eats them first, that 70-80% of these fish will recover and survive. Only one thing will cause 100% of them to die - well intended fishermen poking a hole in the stomach with a knife or other sharp object to "help the fish swim down." }