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Squatina japonica Bleeker, 1858
JAPANESE ANGELSHARK
Life   Vertebrata   Fish   Squatinidae   Squatina


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Kingdom Animalia  
 Phylum Chordata  
 Class Chondrichthyes  
 Order Squatiniformes  
 Family Squatinidae  
 Genus Squatina  
  Squatina japonica    Bleeker, 1858 
Provider: Pofeng Lee& Shoou-Jeng Joung 
hierarchy tree    download xml    download txt    Chinese Page    
Citation: 臺灣魚類誌(沈等, 1993); 福建魚類誌(朱等, 1985)
Character: Body depressed, trunk moderately narrow. Anterior nasal barbells simple and with a narrow, spatulate tip. Posterior nasal flaps between nasal barbells and tips weakly fringed or smooth. Distance between eye and spiracle less than 1.5 times eye diameter. Dermal folds on each side of head without triangular lobes. Pectoral fin with rounded free rear tips. Spines present on midline of back and tail from head to dorsal fins and between the fin bases, and on snout and above eyes. Body without ocelli. 
Habitat: An uncommon, little-known angelshark, found on or near the bottom. Maximum total length about 2 m. 
Distribution: Western North Pacific from southeastern sea of Japan to Yellow Sea, Japan, Koreas, northern China. 
Utility: This species apparently taken in large numbers off China. Utilized for human consumption. 
Name Code: 383223
  IUCN Red List:VU  A2d+4d      Marine     
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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Squatina&speciesname=japonica ---> https://www.fishbase.se/Summary/speciesSummary.php?genusname=Squatina&speciesname=japonica
https://www.fishbase.se/Summary/speciesSummary.php?genusname=Squatina&speciesname=japonica ---> https://www.fishbase.se/summary/Squatina-japonica.html

Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Squatina japonica Bleeker , 1858

Japanese angelshark Add your observation in Fish Watcher
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This map was computer-generated and has not yet been reviewed.
Squatina japonica   AquaMaps   Data sources: GBIF OBIS
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Pictures | Google image Image of Squatina japonica (Japanese angelshark) Squatina japonica
Picture by FAO

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: milieu / climate zone / depth range / distribution range Ecology

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

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

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

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 ).

Biology     Glossary (e.g. epibenthic)

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 ).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Ovoviviparous, embryos feed solely on yolk (Ref. 50449 ).

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. (Ref. 247 )

IUCN Red List Status (Ref. 120744 )

  Vulnerable (VU)  (A2d+4d); Date assessed: 01 December 2008

CITES (Ref. 115941 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Traumatogenic




Human uses

Fisheries: minor commercial FAO(fisheries: species profile ; publication : search ) | FishSource |

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Estimates of some properties based on models

Preferred temperature (Ref. 115969 ): 5.7 - 20.7, mean 17.3 (based on 123 cells). Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.00741 (0.00281 - 0.01956), b=3.04 (2.81 - 3.27), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (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 .

Entered by Carpenter, Kent E. Modified by Luna, Susan M. Fish Forum
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