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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