- Scientists are puzzled by a spate of discoveries of two-headed sharks
- They rarely survive long in their natural habitat due to the difficulty of hunting
- The question is, why is this happening?
Two-headed sharks are being found being born all over the world, most commonly Atlantic sawtail catsharks.
They are born with two distinct heads and four gills and four fins, yet fused lower down their bodies and having only one tail.
The genetic condition is known as 'dicephaly', which literally means 'two brains'.
The most recent cases are from Australia and Spain. The Spanish research team's findings were published in the Journal of Fish Biology, documenting that the two-headed specimen was only an embryo that was bred as part of their research and happened completely coincidentally.