Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (sharks and rays) > Squatiniformes (Angel sharks) > Squatinidae (Angel sharks)
Etymology: Squatina: Latin, squatina, -ae = a kind of shark (Ref. 45335). More on author: Bleeker.

Environment / Climate / Range Ecology

Marine; demersal. Subtropical; 41°N - 19°N, 111°E - 139°E (Ref. 54906)

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 200 cm TL male/unsexed; (Ref. 247)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal spines: 0; Anal soft rays: 0. Japanese angelshark Squatina japonica has broad pectoral fins with rounded free rear tips, posterior margin nearly straight, inner margin strongly convex; nasal barbels simple and spatulate. Anterior nasal flaps smooth to weakly fringed; dermal folds on sides of head without lobes. Rear tip of inner margin of pelvic fins considerably anterior to origin of first dorsal; very short hypocercal tail. Rows of moderately large spines on midline of back and tail from head to dorsal fins and between fin bases, and on snout and above eyes. Body color blackish brown with small dark and pale spots; no ocelli (eye-like spot) (Ref. 247, 31369, 12951).

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions | Faunafri

Northwest Pacific: Japan, Yellow Sea, Korea, and northern China.

A little-known angelshark, found on or near the bottom (Ref. 247). Lives in sandy ground. A carnivore that eats benthic animals (Ref. 9137). Ovoviviparous (Ref. 50449). Utilized for human consumption and for preparation of shagreen (Ref. 247).

Main reference Upload your references | References | Coordinator : Compagno, Leonard J.V. | Collaborators

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.

IUCN Red List Status (Ref. 90363)

Vulnerable (VU) (A2d+4d)

Threat to humans

Traumatogenic

Human uses

Fisheries: minor commercial

FAO(fisheries: species profile; publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on empirical models

Phylogenetic diversity index (Ref. 82805): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01246 (-0.24980 - 0.27473), b=2.99786 (2.86512 - 3.13059), based on LWR estimates for this family-BS (Ref. 93245).

Trophic Level (Ref. 69278): 3.5 ±0.37 se; Based on food items.

Resilience (Ref. 69278): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).

Vulnerability (Ref. 59153): Very high vulnerability (77 of 100) .

Price category (Ref. 80766): Medium.

Squatina japonica Bleeker, 1858