Confirmed (dark blue) and suspected (light blue) range of the bignose shark[2]
Synonyms
Carcharhinus radamae Fourmanoir, 1961
Eulamia altima S. Springer, 1950
The bignose shark (Carcharhinus altimus) is a species of requiem shark, in the family Carcharhinidae. Distributed worldwide in tropical and subtropical waters, this migratory shark frequents deep waters around the edges of the continental shelf. It is typically found at depths of 90–430 m (300–1,410 ft), though at night it may move towards the surface or into shallower water. The bignose shark is plain-colored and grows to at least 2.7–2.8 m (8.9–9.2 ft) in length. It has a long, broad snout with prominent nasal skin flaps, and tall, triangular upper teeth. Its pectoral fins are long and almost straight, and there is a ridge on its back between the two dorsal fins.
Hunting close to the sea floor, the bignose shark feeds on bony and cartilaginous fishes, and cephalopods. It is viviparous, meaning the embryos are sustained to term via a placental connection. Females bear litters of three to 15 pups after a 10-month gestation period. Despite its size, this shark lives too deep to pose much danger to humans. It is caught incidentally by commercial fisheries in many parts of its range; the meat, fins, skin, liver oil, and offal may be used. The various fishing pressures within its range are cause for concern given its slow reproductive rate, and it may have already declined in the northwestern Atlantic and elsewhere.
^Rigby, C.L.; Morgan, D.L.; Derrick, D. (2020). "Carcharhinus altimus". IUCN Red List of Threatened Species. 2020: e.T161564A890724. doi:10.2305/IUCN.UK.2020-3.RLTS.T161564A890724.en. Retrieved 19 November 2021.
^Cite error: The named reference compagno et al was invoked but never defined (see the help page).
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