What is barotrauma?

“Barotrauma” is the term used to describe any of the number of injuries, or trauma, a fish may receive from rapid changes in atmospheric (i.e. barometric) pressures. For fish caught by anglers, these rapid pressure changes occur when fish are reeled to the surface from deep water. Barotrauma injuries include things like eversion, prolapse, torsion and volvulus of the stomach, hemorrhaging of internal organs, hematomas, and loss of vision. Most internal injuries are not visible to anglers, but one obvious symptom of barotrauma is the over-inflated swim bladder, which will push the fish’s stomach out of its mouth and make it impossible for the fish to swim back to the depth it came from.