Mystery of the TWO-HEADED sharks: The mutant fish are appearing at alarming rates – and no one knows why
The puzzling trend started in 2008, and numbers are on the rise
It is unknown how long these mutants are able to survive in the wild
What prompted the growing mutant numbers is a mystery to science
Some suggest that over-fishing is encouraging more inbreeding in sharks.
Two-headed sharks sound like a monster ripped straight out of a B-list horror movie, but scientists are increasingly finding more of them worldwide.
Some have suggested that the surge in mutants is due to genetic abnormalities triggered by over-fishing.
The puzzling trend started in 2008, when fisherman Christian Johnson caught a two-headed blue shark embryo off the coast of Australia.
In 2013, a group of Floridian fishermen strained to haul in a large Bull shark, but upon gutting it found that its uterus housed a two-headed fetus.