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Did you know that Spotted Ratfish (Hydrolagus colliei) have a RETRACTIBLE BARBED PROTRUSION ON THEIR FOREHEAD TO HELP THEM HOLD ON WHEN MATING?!
This has to be one of the coolest adaptations I've ever heard of!
#ObscureSharkThursday
#CartilaginousSharkCousins
©Jacqui Engel