Most sharks have five gill slits on either side. But Hexanchus griseus, a giant and mysterious shark species, has an even six ...
MYSTERIOUS monster sharks that outlived the dinosaurs have been found lurking in waters just 20ft deep off the US coast. The giant sixgill sharks have been spotted year-round in Washington ...
The Cool Down on MSN
Mysterious 14-foot shark that predates dinosaurs may be returning to Puget Sound to give birth
"We hope to answer questions about the life history and ecology of sixgill sharks." ...
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