Sawback angelshark
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| Sawback angelshark | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | Squatiniformes |
| Family: | Squatinidae |
| Genus: | Squatina |
| Species: | S. aculeata
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| Binomial name | |
| Squatina aculeata Cuvier, 1829
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| Range of sawback angelshark (in blue) | |
The sawback angelshark (Squatina aculeata) is an angelshark of the family Squatinidae[2]
Measurements
Mature ~ 100.0–124 cm TL; Max ~ 188 cm TL.
Appearance
Color: Are a dull grey to a light brown on back that has scarcely scattered with small irregular white spots and also with regular small dark brownish spots. No ocelli. Obtains dark blotches on head, back, the fin bases and tail. Body: Obtains large thorns atop its head in a row down its back. Has concave between eye, eye spiracle distance <1.5 x eye length. Has heavily fringed nasal barbels and including anterior nasal flaps.
Distribution and range
Eastern Atlantic: western Mediterranean, Morocco, Senegal, Guinea to Nigeria, then Gabon to Angola. 43°N - 19°S, 18°W - 30°E.
Climate and habitat
Subtropical; offshore species, outer continental shelf and upper slope, demersal, marine. Usually found on muddy bottoms. 30–500 m (98–1,640 ft) down.
Behavior
As with other angelsharks, the sawback angelshark is a bottom-dweller that tries to camouflage at the bottom of the ocean in order to ambush and capture its prey.
Biology
Diet: feeds on small sharks, bony fishes, cuttlefish, and crustaceans. Reproduction: are ovoviviparous.
Status
IUCN Red List: Critically Endangered. Added to endangered species list in 2007 due to overexploitation.[3]
Threat to humans
Sawback angelshark may be dangerous to humans if disturbed.
Resilience & vulnerability
Low, minimum population doubling time: 4.5–14 years; high to very high vulnerability.
References
- ^ Morey, G., Serena, F., Mancusi, C., Coelho, R., Seisay, M., Litvinov, F. & Dulvy, N. 2007. Squatina aculeata. The IUCN Red List of Threatened Species 2007: e.T61417A12477164. https://dx.doi.org/10.2305/IUCN.UK.2007.RLTS.T61417A12477164.en. Downloaded on 26 October 2017.
- ^ "Species Squatina aculeata Cuvier". FishWisePro. 1829. Retrieved 19 April 2020.
- ^ Morey, G.; Serena, F.; Mancusi, C.; Coelho, R.; Seisay, M.; Litinov, F.; Dulvy, N. (2007). "The IUCN Red List of Threatened Species 2007". doi:10.2305/IUCN.UK.2007.RLTS.T61417A12477164.en.
{{cite journal}}: Cite journal requires|journal=(help)
- Froese, Rainer; Pauly, Daniel (eds.). "Squatina aculeata". FishBase. July 2006 version.
- Compagno, Dando, & Fowler, Sharks of the World, Princeton University Press, New Jersey 2005 ISBN 0-691-12072-2
External links
| Squatina aculeata |
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