Japanese angelshark (Squatina japonica) fish species and Japanese angelshark 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)

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

Japanese angelshark (Squatina japonica) fish species information

Classification

Distribution

Environment

Physical Size and Genetics

Human Uses and Population