Japanese angelshark (Squatina japonica) fish species and information / pictures of Japanese angelshark - Squatina japonica

Japanese angelshark (Squatina japonica) fish species information

Scientific Name
Squatina japonica

Common Name
Japanese angelshark

Biology
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).

Classification

Classified By
Bleeker, 1858
Class
Sharks and Rays (Elasmobranchii)
Order
Angel sharks (Squatiniformes)
Family
Angel sharks (Squatinidae)

Distribution

Region
Northwest Pacific
Distribution
Northwest Pacific: Japan, Yellow Sea, Korea, and northern China.
Range
41°N - 19°N, 111°E - 139°E

Environment

Climate
Subtropical
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
Unknown m
Depth To - meters
Unknown m
Zone
demersal
Environment
Marine; demersal
Trophic Level
3.5 s.e. 0.37 Based on food items.
Occurs in Marine / Salt water
True
Occurs in Brackish water
False
Occurs in Fresh Water
False
Occurs on Reefs
False
Is kept in Aquariums
False

Physical Size and Genetics

Maximum Length
200 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Fisheries: minor commercial
Vulnerability
Very high vulnerability (77 of 100)
Resilience
Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be
Threat To Humans
  Traumatogenic
IUCN Red List Status
  Vulnerable (VU) (A2d+4d)