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The bonnethead (Sphyrna tiburo), also called a bonnet shark or shovelhead, [3] is a small member of the hammerhead shark genus Sphyrna, and part of the family Sphyrnidae.It is an abundant species in the littoral zone of the North Atlantic and the Gulf of Mexico, is the only shark species known to display sexual dimorphism in the morphology of the head, and is the only shark species known to be ...
This shark is plain gray to slate above and whitish below, with a faint lighter stripe on the flanks. The pectoral, dorsal, and caudal fins may darken toward the tips. [11] The smalltail shark reaches a maximum known length of 1.5 m (4.9 ft), [12] though 0.9–1.1 m (3.0–3.6 ft) is typical. Females grow larger than males.
The Pacific smalltail shark (Carcharhinus cerdale) is a species of requiem shark, in the family Carcharhinidae. It was described in 1898, but later mistakenly merged with Carcharhinus porosus. The mistake was corrected in 2011. [2] [3] It is relatively small with skin of a light-brownish color, and it can be found in the Pacific Ocean.
Euprotomicroides zantedeschia Hulley & M. J. Penrith, 1966 (tail-light shark) Genus Euprotomicrus T. N. Gill, 1865. Euprotomicrus bispinatus Quoy & Gaimard, 1824 (pygmy shark) Genus Heteroscymnoides Fowler, 1934. Heteroscymnoides marleyi Fowler 1934 (long-nose pygmy shark) Genus Isistius T. N. Gill, 1865. Isistius brasiliensis Quoy & Gaimard ...
The Atlantic sharpnose shark is a small shark in comparison to others. The Atlantic sharpnose shark's maximum species length is known to be about 110–120 cm (3.6–3.9 ft). Although its average adult size tends to be about 91.4–99 cm (3.00–3.25 ft). Reports exist of these sharks living up to 19 years in the wild. [2]
The common thresher is a fairly robust shark with a torpedo-shaped trunk and a short, broad head. The dorsal profile of the head curves evenly down to the pointed, conical snout. The eyes are moderately large and lack nictitating membranes. The small mouth is arched and, unlike in other thresher sharks, has furrows at the corners.
The daggernose shark (Isogomphodon oxyrhynchus) is a little-known species of requiem shark, in the family Carcharhinidae, and the only extant member of its genus.It inhabits shallow tropical waters off northeastern South America, from Trinidad to northern Brazil, favoring muddy habitats such as mangroves, estuaries, and river mouths, though it is intolerant of fresh water.
Deep-sea chimaera photographed by the NOAAS Okeanos Explorer.Visible on its snout are tiny pores which lead to electroreceptor cells.. Chimaeras are soft-bodied, shark-like fish with bulky heads and long, tapered tails; measured from the tail, they can grow up to 150 cm (4.9 ft) in length.