nurse shark

noun

1. any of several sharks of the family Orectolobidae, especially Ginglymostoma cirratum, occurring in shallow waters from Rhode Island to Brazil and the Gulf of California to Ecuador.

noun

1. any of various sharks of the family Orectolobidae, such as Ginglymostoma cirratum of the Atlantic Ocean, having an external groove on each side of the head between the mouth and nostril