She is portrayed by Lea Thompson in Jaws 3D.
Kelly helps Sean to vanquish his fear of water because of shark's attack, five years ago. Kelly encounters the shark while she is in the bumper boats with Sean towards the middle of the film when a guy bumps the boat it tips over. Then the shark brushes against her left leg and takes a bite. However, Kelly succeeds to escape her. Then the shark charges towards a pier in the beach area. Eating a guy or 2 guys off-screen (possibly) before disappearing. Kelly is transported to the hospital with Sean goes with her.
Kelly's final fate is unknown but as she is not count in Brucetta's victims, it means that she survived at her injury and is always alive.