Paxton's escolar (Rexichthys johnpaxtoni) fish species and information / pictures of Paxton's escolar - Rexichthys johnpaxtoni

Paxton's escolar (Rexichthys johnpaxtoni) fish species information

Scientific Name
Rexichthys johnpaxtoni

Common Name
Paxton's escolar

Biology
Dorsal spines (total): 19; Dorsal soft rays (total): 14-15; Anal spines: 2; Anal soft rays: 12 - 13; Vertebrae: 34. Body moderately elongate and compressed. Two lateral lines, the lower originating below the 6th to the 7th spine of the first dorsal fin, descending sharply to ventral contour of body, dividing into a short anterior branch and a much longer posterior branch. The pelvic fin represented by 1 spine and 2 tiny soft rays in smaller specimens but entirely absent in specimens over 10 cm SL. Body color is brownish, fins hyaline; first dorsal fin with a black blotch distally on two anterior membranes.

Classification

Classified By
Parin & Astakhov, 1987
Class
Ray-finned fishes (Actinopterygii)
Order
Perch-like fish (Perciformes)
Family
Snake mackerels (Gempylidae)

Distribution

Region
Western Pacific
Distribution
Western Pacific: eastern coast of Australia between 17?31'S and 32?34'S, and from New Caledonia.
Range
17°S - 35°S, 140°E - 170°W

Environment

Climate
Deep-water
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
270 m
Depth To - meters
470 m
Zone
benthopelagic
Environment
Marine; benthopelagic; depth range 270 - 470 m (Ref. 9784)
Trophic Level
3.81 s.e. 0.53 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
22.0 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 (25 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