"I think it is outrageous," said Moby Solangi, the executive director of Institute for Marine Mammal Studies in Gulfport, Mississippi. "These animals are very docile, very friendly and they're very curious. They come close to the boats, so if you're out there, you'll see them riding the bows. And their curiosity and friendship brings them so close that they become targets and that's the unfortunate thing."
Dolphins are among the species protected by the 1972 Marine Mammal Protection Act. Violators can be fined up to $10,000 per violation and sent to prison for a year.
The gruesome discoveries are heartbreaking for Gulf Coast scientists, who follow the population. Fougeres said that two months before the 2010 oil spill disaster off the coast of Louisiana, dolphins began stranding themselves and that there were unusually high mortality rates — possibly due to a cold winter that year.
Since then, the spill and another cold winter in 2011 have contributed to several deaths within the Gulf's dolphin population, experts say. Investigators have also found discolored teeth and lung infections within some of the dead dolphins.
Since Feb. 2010, experts have tallied more than 700 recorded dolphin deaths.
Experts have also found increased "human interaction" cases, which include dolphins tangled in fishing lines — and the more violent incidents.
Fougeres cautions that some of the dolphin mutilations might have happened after the animal died from natural causes and washed ashore. She said that in the case of the dolphin with the lower jaw missing, someone could have cut off the jaw for a souvenir after the animal died.