No one knows how it formed or when it will stop growing.
Their carcasses remain floating on the sea floor and it's giving people the creeps.
The alarming discovery extends far beyond Florida.
SEAL Team 6 had gained notoriety for killing Osama Bin Laden just three months prior to the incident.
A group of dolphins protected the swimmer from a shark just in the nick of time.
The extremely rare creature was mostly unknown to scientists until recently.
"It was more extreme than anything I’ve seen there," said a photographer witness.
Harvard professor Avi Loeb's team of scientists are now trying to retrieve it.