Scientists have recently found a sawtail catshark in the Mediterranean that's making headlines around the world.
The Spanish team of researchers say they've discovered the very first case of a two-headed shark developing in a shark species that lays eggs. The creature, which was featured in an article in the Journal of Fish Biology, is a species of shark that lives only in the Mediterranean and is considered endangered.
Scientists collected nearly 800 embryos to study their cardiovascular systems. One of those embryos showed two heads, each of which had its own mouth, eyes, brains, and gills. The shark also had two stomachs and two livers but shared a single intestine.
This current finding is noteworthy because all other instances of dicephaly in sharks were found in species that gave birth to live young or laid eggs which hatched inside the mother.
It's worth noting, however, that your chances of running into a two-headed shark while you're in the water are probably pretty low. George Burgess, director of shark research at the Florida Museum of Natural History, says, "There’s a reason you don’t see a lot of sharks with two heads swimming around: They stand out like a sore thumb, so they get eaten."
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