A fisher off the Florida Keys made an amazing discovery: A two-headed Bull Shark. It’s the first time that phenomenon has been documented in that type of shark. In this case, having two mouths does NOT make it twice as dangerous.
The deformity is technically called “axial bifurcation”. It’s been seen in turtles and even humans, but it’s only been documented in sharks 6 times in the past and never before in Bull Sharks.
"Halfway through the process of forming twins, the embryo stops dividing," according to Michael Wagner, a study co-author and researcher at Michigan State.
It’s doubtful the shark would have lived long had the mother escape the fisher and brought the fetus to term. Having two heads completely undoes the sleek, streamlined shark body the species needs to move quickly to attack its prey. The sample also has a severely undersized body, making it doubtful it could even propel itself through the Caribbean Sea.