Nurse sharks are the laziest of sharks. Because they do not have to move to breathe, they are quite sedentary. Take this quiz to learn more about the nurse shark.
Nurse sharks have a very long caudal fin, making up more than 25 percent of its length.
The nurse shark uses its pharynx, which is a muscular cavity, to suck in its prey.
The nurse shark has small and non-serrated teeth.
Although they do not have the same bite as sharks with razor sharp teeth, the nurse shark has an incredibly strong and damaging bite.
The nurse shark uses its barbels to smell the scent of its next meal.
Some sharks have ram-jet ventilation and must move to breathe. Nurse sharks have a respiratory system that pumps water over their gills so they can to breathe without moving.
Nurse sharks mostly hunt for food at night.
They rest during the day.
Nurse sharks may be viewed on display in aquariums such as the New England Aquarium in Boston, Massachusetts. When captured they are easy to care for and quite hardy.
A litter of pups may be fertilized by more than one male nurse shark.
The male shark bites the female's pectoral fin and holds her in place.
The babies are born already one foot long.
The nurse shark is pregnant for six months.
Nurse sharks suck up their prey, and sometimes they suck up corral and algae unintentionally.
Usually nurse sharks will attack humans only when provoked -- like when stepped upon in shallow water. Their bite is exceptionally strong, and surgery or special equipment has been needed to release the shark's bite.