Nurse Shark

Explore the underwater world of this bottom-dwelling shark. Learn why humans have little to fear, and much to learn, from nurse sharks.

Nurse sharks prefer to dwell near the sea floor in the warm, shallow waters of the western Atlantic and eastern Pacific oceans.

Common Name: Nurse Shark
Scientific Name: Ginglymostoma cirratum
Type: Fish
Diet: Carnivores
Size: 7.5 to 9.75 ft
Weight: 200 to 330 lbs

Size relative to a 6-ft man

IUCN Red List Status: 
close

The IUCN Red List of Threatened Species is widely recognized as the most comprehensive, objective global approach for evaluating the conservation status of plant and animal species.

lc

Least Concern

At relatively low risk of extinction

nt

Near Threatened

Likely to become vulnerable in the near future

vu

Vulnerable

At high risk of extinction in the wild

en

Endangered

At very high risk of extinction in the wild

cr

Critically Endangered

At extremely high risk of extinction in the wild

ew

Extinct in the Wild

Survives only in captivity

ex

Extinct

No surviving individuals in the wild or in captivity

Data Deficient

Not enough information available to make an assessment

Not Evaluated

No assessment has been made

?
Data Deficient
lc
nt
vu
en
cr
ew
ex
least concernextinct
Current Population Trend: 

Unknown


The scientific name for the nurse shark sounds like something Bilbo Baggins might have said to summon elves to his rescue: Ginglymostoma cirratum. Actually the name is a mix of Greek and Latin and means "curled, hinged mouth" to describe this shark's somewhat puckered appearance.

Etymology

The origin of the name "nurse shark" is unclear. It may come from the sucking sound they make when hunting for prey in the sand, which vaguely resembles that of a nursing baby. Or it may derive from an archaic word, nusse, meaning cat shark. The most likely theory though is that the name comes from the Old English word for sea-floor shark: hurse.

Characteristics

Nurse sharks are slow-moving bottom-dwellers and are, for the most part, harmless to humans. However, they can be huge—up to 14 feet—and have very strong jaws filled with thousands of tiny, serrated teeth, and will bite defensively if stepped on or bothered by divers who assume they’re docile.

They use their strong jaws to crush and eat shellfish and even coral, but prefer to dine on fish, shrimp, and squid. They are gray-brown and have distinctive tail fins that can be up to one-fourth their total length. Unlike most other sharks, nurses are smooth to the touch.

Habitat and Range

Nurse sharks are found in the warm, shallow waters of the western Atlantic and eastern Pacific oceans. They are abundant throughout their range and have no special conservation status, although the closeness of their habit to human activities is putting pressure on the species. 

PUBLISHED

Follow Us

twitter