Tonga escolar (Tongaichthys robustus) fish species and information / pictures of Tonga escolar - Tongaichthys robustus

Tonga escolar (Tongaichthys robustus) fish species information

Scientific Name
Tongaichthys robustus

Common Name
Tonga escolar

Biology
Dorsal spines (total): 16 - 17; Dorsal soft rays (total): 14-17; Anal spines: 1; Anal soft rays: 14 - 16; Vertebrae: 33. Head relatively large. Scales on cheeks enlarged, elongate and slightly overlapping. Color is dark brown above, slightly paler below.

Classification

Classified By
Nakamura & Fujii, 1983
Class
Ray-finned fishes (Actinopterygii)
Order
Perch-like fish (Perciformes)
Family
Snake mackerels (Gempylidae)

Distribution

Region
Pacific Ocean
Distribution
Pacific Ocean: Several specimens (38 individuals) were reported from the Tonga Ridge; around Fiji; 1 specimen from off Flinders Reef, Queensland (17?33'S, 149?46'E, CSIRO no. H1185-01).
Range
12°S - 27°S, 144°E - 174°W

Environment

Climate
Deep-water
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
288 m
Depth To - meters
312 m
Zone
bathyalpelagic
Environment
Marine; bathypelagic; depth range 288 - 312 m (Ref. 6181)
Trophic Level
3.9 s.e. 0.55 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
30.0 cm
Common Length
Unknown 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
Unknown
Vulnerability
Low to moderate vulnerability (32 of 100)
Resilience
Medium, minimum population doubling time 1.4 - 4.4 years (Assuming tmax>3)
Threat To Humans
  Harmless
IUCN Red List Status
  Not Evaluated