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The lemon shark was first named and described in 1868 by Felipe Poey. [7] He originally named it Hypoprion brevirostris, but later renamed it Negaprion brevirostris. [7] The lemon shark has also appeared in literature as Negaprion fronto and Carcharias fronto (Jordan and Gilbert, 1882), Carcharias brevirostris (Gunther, 1870), and Carcharhinus brevirostris (Henshall, 1891).
While overall similar, this shape differs somewhat between species; examples are: a distinct T-shape in the great hammerhead, a rounded head with a central notch in the scalloped hammerhead, and an unnotched rounded head in the smooth hammerhead. [5] Hammerheads have disproportionately small mouths compared to other shark species. [6]
The sicklefin lemon shark usually swims close to the bottom. Courtship behavior - a male (right) follows a female. A sluggish species, the sicklefin lemon shark is usually seen cruising sedately just above the sea bottom or lying still on it, as unlike most requiem sharks, it is capable of actively pumping water over its gills.
The name nurse shark is thought to be a corruption of nusse, a name which once referred to the catsharks of the family Scyliorhinidae. The nurse shark family name, Ginglymostomatidae, derives from the Greek words ginglymos ( γίγγλυμος ) meaning "hinge" and stoma ( στόμα ) meaning "mouth".
Some of the bigger shark species, such as great white sharks, bull sharks, hammerheads and tiger sharks, can come close to shore but are generally not seen from the beach unless one is brought in ...
Lemon shark. Blue shark. Sand tiger shark. Several species of hammerhead sharks. ... If a shark were to bite you, the best thing you can do would be to stay calm. Don’t panic, get to shore and ...
Holly Thomas writes the depiction of sharks as murderous fiends on the basis of remarkably few negative encounters is gravely hypocritical in the face of humans’ devastating effects on them ...
The grey reef shark has a typical "reef shark" shape with a broad, round snout and large eyes. This species can be distinguished from similar species by the plain or white-tipped first dorsal fin , the dark tips on the other fins, the broad black rear margin on the tail fin , and the lack of a ridge between the dorsal fins.