Species of shark
Sawback angelshark
Conservation status
Critically Endangered (IUCN 3.1 )[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Chondrichthyes
Superorder:
Selachimorpha
Order:
Squatiniformes
Family:
Squatinidae
Genus:
Squatina
Species:
S. aculeata
Binomial name
Squatina aculeata Cuvier , 1829
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: Sawback Angelsharks 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.; Barker, J.; Bartolí, A.; Gordon, C.; Hood, A.; Jimenez-Alvarado, D.; Meyers, E.K.M. (2019). "Squatina aculeata " . IUCN Red List of Threatened Species . 2019 : e.T61417A116768915. doi :10.2305/IUCN.UK.2019-1.RLTS.T61417A116768915.en . Retrieved 18 November 2021 .
^ "Species Squatina aculeata Cuvier" . FishWisePro . 1829. Retrieved 19 April 2020 .
^ Morey, G.; Barker, J.; Bartolí, A.; Gordon, C.; Hood, A.; Jimenez-Alvarado, D.; Meyers, E.K.M. (2019). "Squatina aculeata " . IUCN Red List of Threatened Species . 2019 : e.T61417A116768915. doi :10.2305/IUCN.UK.2019-1.RLTS.T61417A116768915.en . Retrieved 18 November 2021 .
Froese, Rainer; Pauly, Daniel (eds.) (2006). "Squatina aculeata " in FishBase . July 2006 version.
Compagno , Dando, & Fowler, Sharks of the World , Princeton University Press, New Jersey 2005 ISBN 0-691-12072-2
External links [ ]
Sharks portal
Extant shark species
Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Class Chondrichthyes
Subclass Elasmobranchii
Subdivision Selachii
Order Carcharhiniformes (Ground sharks)
Hemigaleidae (Weasel sharks)
Leptochariidae
Leptocharias
Barbeled houndshark (L. smithii )
Proscylliidae (Finback sharks)
Pseudotriakidae
Gollum
Slender smooth-hound (G. attenuatus )
Pseudotriakis
False catshark (P. microdon )
Sphyrnidae (Hammerhead sharks)
Eusphyra
Winghead shark (E. blochii )
Sphyrna
Scalloped bonnethead (S. corona )
Whitefin hammerhead (S. couardi )
Scalloped hammerhead (S. lewini )
Scoophead (S. media )
Great hammerhead (S. mokarran )
Bonnethead (S. tiburo )
Smalleye hammerhead (S. tudes )
Smooth hammerhead (S. zygaena )
Triakidae (Houndsharks)
Carcharhinidae
Large family listed below
Scyliorhinidae
Large family listed below
Family Carcharhinidae (Requiem sharks)
Carcharhinus
Blacknose shark (C. acronotus )
Silvertip shark (C. albimarginatus )
Bignose shark (C. altimus )
Graceful shark (C. amblyrhynchoides )
Grey reef shark (C. amblyrhynchos )
Pigeye shark (C. amboinensis )
Borneo shark (C. borneensis )
Copper shark (C. brachyurus )
Spinner shark (C. brevipinna )
Nervous shark (C. cautus )
Whitecheek shark (C. dussumieri )
Silky shark (C. falciformis )
Creek whaler (C. fitzroyensis )
Galapagos shark (C. galapagenisis )
Pondicherry shark (C. hemiodon )
Finetooth shark (C. isodon )
Smoothtooth blacktip shark (C. leiodon )
Bull shark (C. leucas )
Blacktip shark (C. limbatus )
Oceanic whitetip shark (C. longimanus )
Hardnose shark (C. macloti )
Blacktip reef shark (C. melanopterus )
Dusky shark (C. obscurus )
Caribbean reef shark (C. perezii )
Sandbar shark (C. plumbeus )
Smalltail shark (C. porosus )
Blackspot shark (C. sealei )
Night shark (C. signatus )
Spottail shark (C. sorrah )
Australian blacktip shark (C. tilstoni )
Galeocerdo Glyphis (River sharks)
Ganges shark (G. gangeticus )
Northern river shark (G. garricki )
Speartooth shark (G. glyphis )
Irrawaddy river shark (G. siamensis )
Borneo river shark (Glyphis sp. B )
Isogomphodon
Daggernose shark (I. oxyrhynchus )
Lamiopsis Loxodon Nasolamia Negaprion
Sicklefin lemon shark (N. acutidens )
Lemon shark (N. brevirostris )
Prionace Rhizoprionodon Scoliodon
Spadenose shark (S. laticaudus )
Triaenodon
Whitetip reef shark (T. obesus )
Family Scyliorhinidae (Catsharks)
Order Heterodontiformes (Bullhead sharks)
Chlamydoselachidae
Chlamydoselachus
Frilled shark (C. anguineus )
Southern African frilled shark (C. africana )
Hexanchidae (Cow sharks)
Heptranchias Hexanchus
Bluntnose sixgill shark (H. griseus )
Bigeyed sixgill shark (H. nakamurai )
Notorynchus
Broadnose sevengill shark (N. cepedianus )
Order Lamniformes (Mackerel sharks)
Alopiidae
Alopias (Thresher sharks)
Pelagic thresher (A. pelagicus )
Bigeye thresher (A. superciliosus )
Common thresher (A. vulpinus )
Alopias sp. (A. sp. )
Cetorhinidae
Cetorhinus
Basking shark (C. maximus )
Lamnidae
Carcharodon
Great white shark (C. carcharias )
Isurus
Shortfin mako shark (I. oxyrinchus )
Longfin mako shark (I. paucus )
Lamna
Salmon shark (L. ditropis )
Porbeagle (L. nasus )
Megachasmidae
Megachasma
Megamouth shark (M. pelagios )
Mitsukurinidae
Mitsukurina
Goblin shark (M. owstoni )
Odontaspididae
Carcharias
Grey nurse shark (C. taurus )
Indian sand tiger (C. tricuspidatus )
Odontaspis
Smalltooth sand tiger (O. ferox )
Bigeye sand tiger (O. noronhai )
Pseudocarchariidae
Pseudocarcharias
Crocodile shark (P. kamoharai )
Order Orectolobiformes (Carpet sharks)
Brachaeluridae
Brachaelurus Heteroscyllium
Bluegrey carpetshark (H. colcloughi )
Ginglymostomatidae (Nurse sharks)
Ginglymostoma
Nurse shark (G. cirratum )
Nebrius
Tawny nurse shark (N. ferrugineus )
Pseudoginglymostoma
Short-tail nurse shark (P. brevicaudatum )
Hemiscylliidae (Bamboo sharks)
Chiloscyllium
Arabian carpetshark (C. arabicum )
Burmese bamboo shark (C. burmensis )
Bluespotted bamboo shark (C. caerulopunctatum )
Grey bamboo shark (C. griseum )
Hasselt's bamboo shark (C. hasseltii )
Slender bamboo shark (C. indicum )
Whitespotted bamboo shark (C. plagiosum )
Brownbanded bamboo shark (C. punctatum )
Hemiscyllium
Indonesian speckled carpetshark (H. freycineti )
H. galei
Papuan epaulette shark (H. hallstromi )
H. henryi
Epaulette shark (H. ocellatum )
Hooded carpetshark (H. strahani )
Speckled carpetshark (H. trispeculare )
Orectolobidae (Wobbegongs)
Parascylliidae (Collared carpet sharks)
Rhincodontidae
Stegostomatidae
Stegostoma
Zebra shark (S. fasciatum )
Order Pristiophoriformes (Sawsharks)
Order Squaliformes
Centrophoridae (Gulper sharks)
Centrophorus
Needle dogfish (C. acus )
Dwarf gulper shark (C. atromarginatus )
Gulper shark (C. granulosus )
Dumb gulper shark (C. harrissoni )
Blackfin gulper shark (C. isodon )
Lowfin gulper shark (C. lusitanicus )
Smallfin gulper shark (C. moluccensis )
Taiwan gulper shark (C. niaukang )
Leafscale gulper shark (C. squamosus )
Mosaic gulper shark (C. tessellatus )
Little gulper shark (C. uyato )
Deania
Dalatiidae
Euprotomicroides
Taillight shark (E. zantedeschia )
Heteroscymnoides
Longnose pygmy shark (H. marleyi )
Mollisquama Dalatias Isistius
Cookiecutter shark (I. brasiliensis )
South China cookiecutter shark (I. labialis )
Largetooth cookiecutter shark (I. plutodus )
Euprotomicrus Squaliolus
Smalleye pygmy shark (S. aliae )
Spined pygmy shark (S. laticaudus )
Etmopteridae
Aculeola
Hooktooth dogfish (A. nigra )
Centroscyllium Etmopterus (Lantern sharks) Miroscyllium
Rasptooth dogfish (M. sheikoi )
Trigonognathus
Viper dogfish (T. kabeyai )
Oxynotidae (Rough sharks)
Somniosidae (Sleeper sharks)
Squalidae (Dogfish sharks)
Order Squatiniformes (Angel sharks)