Nurse Shark – Behaviour, Habitat & Characteristics

The Nurse Shark is a large fish that skates along the bottom of the ocean in search of tasty morsels. This shark is relatively harmless to humans but they will attack when they are provoked. Nurse sharks hang out in groups and feed on crabs, lobsters, stingrays, sea urchins, coral, shrimp, squid and octopus.

Nurse Shark Pictures

Before we dive into everything we know about nurse sharks, we want to show you some pictures of this beautiful predator. Underneath pictures of nurse sharks.

Are Nurse Sharks Aggressive?

No, they are not aggressive. A nurse shark is generally sluggish and relatively harmless to divers and swimmers. The only time that nurse sharks have been seen making attacks is when they are provoked by human beings. They are generally nocturnal and, because of their low activity levels as well as their relatively small size (usually averaging a length of approximately two to four metres), these are ideal sharks for captivity.

Nurse Shark Bite

Nurse sharks can bite humans but it is very rare. It mainy happens when they are provoked. Underneath some pictures of bites by nurse sharks.

Nurse Shark Teeth

Do nurse sharks have teeth? Yes, they do! The teeth of nurse sharks might look small but a bite can be painful. The pictures above show how they can cause harm using their teeth. Once they bite down, they won’t let go. Underneath some pictures of the teeth of nurse sharks.

The Diet Of A Nurse Shark

Trailing along the ocean bed, Nurse Sharks feed mainly off the crabs, lobsters, stingrays, sea urchins, coral, shrimp, squid and octopus that share this habitat. Interestingly, they have been seen grazing on algae and coral when not in hunting mode. With prey that possesses such hard exoskeletons, it is imperative that the Nurse Shark have incredibly powerful jaws.

Characteristics

In addition to its ample jaws, the Nurse Shark is also characterised by a wide head, obvious barbels, a stocky body and an unusually smooth appearance. There is a clear spiracle behind each eye, which is used for respiration and is not, as some have the opinion, an ear. Its teeth areserrated and scalloped to resemble a fan.

Habitat & Migration

Nurse Sharks prefer shallow waters that are warm. They live near sandy beaches or sandbars as well as in coral reefs as these present with an ocean floor close to the water’s surface. Nurse Sharks live predominantly the on continental and insular shelves of the western Atlantic and eastern Pacific oceans. When the water temperatures drop, depending on the season, Nurse Sharks increase their activity levels to maintain a higher body heat rather than opting to migrate to warmer waters.

Behaviour

During the day, Nurse Sharks will rest on the sea bed, often in groups of dozens of sharks at a time. They will lie in a heap, piled on top of one another, waiting for nightfall, when they will begin their search for food.

The Nurse Shark is slow and lazy during the day, making it easy for divers and fishermen to capture. Their skin makes for excellent leather, their flesh is edible (eaten fresh) and their liver is in demand for the oil it holds.

Nurse Sharks are ovoviviparous, meaning that eggs are fertilised and hatched inside the female’s body, where they remain until they are developed enough to be born into the ocean and live independently of parental training.

Nurse Shark Babies

While babies of nurse sharks (also called pups) are still in the mother’s oviduct, they display cannibalistic behaviour, eating immature embryos for nutrition. After a gestation period of about six months, approximately 25 pups are born.

Are Nurse Sharks Endangered?

For these reasons mentioned before, the Nurse Shark, although somewhat protected for its lack of aggressive behaviour and its proximity to the ocean floor, remains threatened by its greatest predator, mankind.

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