Tawny nurse shark色护士鲨
grey nurse shark沙锥齿鲨;灰鲨
N（名词） 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 铰口鲨; 产于大西洋吗，在头部两侧的嘴和鼻孔间长有外部的槽