Elasmobranchii (sharks and rays) >
Squatiniformes (Angel sharks) >
Squatinidae (Angel sharks)
Etymology: Squatina: Latin for skate, which angel sharks superficially resemble, presumably tautonymous with Squalus squatina Linnaeus 1758 (no species mentioned). (See ETYFish); nebulosa: Latin for cloudy or dark, referring to its brown-black marbled coloration. (See ETYFish).
More on author: Regan.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 0 - 200 m (Ref. 54907). Deep-water; 47°N - 22°N, 119°E - 142°E (Ref. 54907)
Northwest Pacific: southeastern Sea of Japan to Taiwan, including Japan, Korea, China. Reported from the northern shelf of the South China Sea (Ref. 12082).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 163.0 cm TL (female)
Found on the continental shelves. Ovoviviparous (Ref. 50449).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae
Ovoviviparous, embryos feed solely on yolk (Ref. 50449).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)
IUCN Red List Status (Ref. 130435)
Threat to humans
Traumatogenic
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201): 11.8 - 23.5, mean 18.1 °C (based on 106 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00293 - 0.01558), b=3.07 (2.88 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trophic level (Ref.
69278): 4.1 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).