8. Nurse shark
The nurse shark (Ginglymostome cirratum) shouldn’t be overlooked just because it doesn’t seem as ferocious as some of its cousins. The shark is a nocturnal predator that scours the seafloor for shellfish and stingrays before lying down in underwater caves or crevices to sleep, according to the Florida Museum. The nurse shark also has barbels—those whisker-like appendages on the ends of its face—which helps the fish sense. But to me, it also gives the animal a wizened appearance.
