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Taiwan angleshark (Squatina formosa) fish species and information / pictures of Taiwan angleshark - Squatina formosa

Taiwan angleshark (Squatina formosa) fish species information

Scientific Name
Squatina formosa

Common Name
Taiwan angleshark

Biology
Dorsal spines (total): 0. Taiwan angelshark Squatina formosa has broad pectoral fins with outer corner more obtuse and free rear tips narrowly subangular; nasal barbels apparently simple, narrow and tapered. Anterior nasal flaps smooth to weakly fringed; dermal folds on sides of head possibly with a triangular lobe. Rear tip of inner margin of pelvic fins reaching little beyond origin of first dorsal. Very short hypocercal tail. Rows of small spines on midline of back and tail, and on snout and between eyes. Color: no ocelli (eye-like spot) on body (Ref. 247, 31369).

Classification

Classified By
Shen & Ting, 1972
Class
Sharks and Rays (Elasmobranchii)
Order
Angel sharks (Squatiniformes)
Family
Angel sharks (Squatinidae)

Distribution

Region
North Western Pacific
Distribution
North Western Pacific: East coast of Taiwan and Ryuku Islands to SE Japan to Izu Peninsula (Ref. 84150); misidentifiction of S. caillieti in the Philippines (Ref. 86399).
Range
24°N - 22°N, 120°E - 121°E

Environment

Climate
Deep-water
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
183 m
Depth To - meters
220 m
Zone
bathydemersal
Environment
Marine; bathydemersal; depth range 183 - 220 m (Ref. 54905)
Trophic Level
3.78 s.e. 0.61 Based on size and trophs of closest relatives
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
55.4 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: of no interest
Vulnerability
Low to moderate vulnerability (33 of 100)
Resilience
Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be
Threat To Humans
  Traumatogenic
IUCN Red List Status
  Endangered (EN) (A2d+4d)