Black gemfish (Nesiarchus nasutus) fish species and information / pictures of Black gemfish - Nesiarchus nasutus

Black gemfish (Nesiarchus nasutus) fish species information

Scientific Name
Nesiarchus nasutus

Common Name
Black gemfish

Biology
Dorsal spines (total): 20 - 22; Dorsal soft rays (total): 19-24; Anal spines: 2; Anal soft rays: 18 - 21; Vertebrae: 34 - 36. Body fairly elongate and strongly compressed. Mouth with fang-like teeth. The tips of both jaws with dermal processes. Gill rakers degenerated. Color is dark brown with violet tint; fin membranes black; margin of anus black (Ref. 6181).

Classification

Classified By
Johnson, 1862
Class
Ray-finned fishes (Actinopterygii)
Order
Perch-like fish (Perciformes)
Family
Snake mackerels (Gempylidae)

Distribution

Region
Probably distributed worldwide in tropical and subtropical seas except in eastern Pacific and northern Indian oceans. Large-sized individuals stray in cold-temperate waters off Iceland, Norway, northern Japan and southern New Zealand (Ref. 6181). Reported from 19?41'S, 79?11'W (Ref. 11892).
Distribution
Probably distributed worldwide in tropical and subtropical seas except in eastern Pacific and northern Indian oceans. Large-sized individuals stray in cold-temperate waters off Iceland, Norway, northern Japan and southern New Zealand (Ref. 6181). Reported from 19?41'S, 79?11'W (Ref. 11892).
Range
70°N - 47°S, 180°W - 180°E

Environment

Climate
Deep-water
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
200 m
Depth To - meters
1200 m
Zone
bathydemersal
Environment
Marine; bathydemersal; depth range 200 - 1200 m (Ref. 6181)
Trophic Level
4.33 s.e. 0.71 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
130 cm
Common Length
80.0 cm
Phylogenetic Diversity Index
PD50 = 1.0000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Fisheries: minor commercial
Vulnerability
High to very high vulnerability (73 of 100)
Resilience
Very Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.)
Threat To Humans
  Harmless
IUCN Red List Status
  Not Evaluated