Ginglymostoma cirratum, the nurse shark, resides in coastal waters in the Pacific and Atlantic Oceans. In the Pacific Ocean, nurse sharks are found in waters off. Ginglymostoma cirratum. These bottom dwelling sharks are usually yellowish-tan to dark brown and, as adults, average around to 8 feet. Reference for: Ginglymostoma cirratum. Source: NODC Taxonomic Code, database (version ). Acquired: Notes: Reference for: Ginglymostoma cirratum.
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Castro, ; Compagno, ; Ebert, et al. Sizes do not vary significantly between sexes. Sharpnose sevengill shark H. Other common names used to refer to this shark include: Nurse sharks are a typically inshore bottom-dwelling species.
At night both juveniles and adults stay between 1 and 20 meters in depth. Taxonomy The nurse ciirratum was first described by Bonnaterreas Squalus cirratus. Family Carcharhinidae Requiem sharks.
Description & Behavior
Allaby, ; Castro, ; Ebert, et al. Females frequently try to avoid contact with males by swimming in very shallow water, where they can bury their pectoral fins in the sand Castro Smalleye pygmy shark S.
Eucrossorhinus Ginglymostoms wobbegong E. The siphon sac is a pair of bladders attached to the claspers of the male that uses seawater to inject its sperm into the cloaca from the clasper.
Smalltooth sand tiger O. The embryo has its own yolk sac, which is absorbed during development, and there is no placental nourishment from the mother. Because they depend on symbiotic photosynthetic algae, zooxanthellae, they cannot live where light does not penetrate.
Nurse sharks have few known predators.
Nurse sharks are polygynandrous and both sexes have multiple partners through a several week mating period in June and Ginglymmostoma. Based on morphological similarities, Ginglymostoma is believed to be the sister genus of Nebriuswith both being placed in a clade that also include species Pseudoginglymostoma brevicaudatumRhincodon typusand Stegostoma fasciatum.
This allows forward movement of replacement teeth that is independent of adjacent teeth in the jaw.
A review of elasmobranch reproductive behavior with a case study on the nurse shark, Ginglymostoma cirratum. Onchobothriidae with description of two new species and comments on the related genera Pachybothrium Baer and Euzet, and Balanobothrium Hornell, The following is a breakdown of stomach contents included in stomach sampling from Castro Start or join a discussion about this species below or send us an email to report any cirrautm or submit suggestions for this page.
Whitetip weasel shark P. Atlantic Ocean the body of water between Africa, Europe, the southern ocean above 60 degrees south latitudeand the western hemisphere. Food and Agriculture Organization of the United Nations. Accessed Monday, December 31, These bottom dwelling sharks are usually yellowish-tan to dark brown and, as adults, average around 7. Sight is limited to 10 meters. Order Orectolobiformes Carpet sharks.
Ginglymostoma cirratum – Discover Fishes
Tawny nurse shark N. Identification and protection of these areas, coupled with further research on the biology of the nurse shark, is needed to provide effective conservation measures Rosa et al. The nurse shark is a common reef-associated bottom-dwelling shark found in cifratum and marine environments in the shallows to m. Juveniles are more often found in crevices in shallow lagoons. Leptocharias Barbeled houndshark L.
Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. ADW doesn’t cover all species in the world, nor does it include all the latest scientific information about organisms we describe.
Heptranchias Sharpnose sevengill shark H. The second dorsal fin is slightly smaller than the first 4. The ADW Team gratefully acknowledges their support.
IUCN Red List of Threatened Species
Geographical Distribution World distribution for the nurse shark. The home range is very limited, sources not listing specific territory sizes. Nurse sharks have a single litter, which often includes multiple paternities. It is not true that that all sharks need to swim in order to breathe, and when they cannot for whatever reason, they die.
Nurse sharks show a strong preference for specific resting sites, repeatedly returning to the same caves and crevices after nocturnal activity Compagno Longnose pygmy shark H.
Large juveniles and adults are usually found around deeper reefs and rocky areas at depths of meters ft during the daytime moving into shallower waters of less than 20 meters 65 ft after dark. Journal of Fisheries Biology. Size at birth is in the cms in range.
A Dictionary of Zoology. First and second dorsal and anal fins are broadly rounded 3. Eyes are very small 6. They are nocturnal, scouting the sea bottom for crustaceans, mollusks and stingrays during the night before returning to their preferred cave or crevice where they will often lay together in groups to sleep during the day Compagno et al.
Group reproductive behaviors in free-living nurse sharks, Ginglymostoma cirratum. It is not an endangered species; however, its abundance in the littoral waters of Florida has decreased in past decades.
Verification of multiple species of Pedibothrium in the Atlantic nurse shark with comments on the Australasian members of the genus.