Hunt is on for dolphin killers in northern Gulf --Mutilated, shot mammals have washed ashore along Gulf Coast 16 Nov 2012 Somebody is maiming and killing dolphins. On Friday, a team from the Institute for Marine Mammal Studies in Gulfport found a dolphin on Ship Island with its lower jaw missing... IMMS investigated the first dolphin shooting earlier this year and incidents have increased in the past few months. In Alabama, someone stabbed and killed a dolphin with a screwdriver, according to a National Oceanic and Atmospheric Administration press release. In September, a dolphin was found on Elmer's Island, La., with a bullet in its lung. Others have been mutilated with knife-like lesions.