Scientific Name
Randallichthys filamentosus

Common Name
Randall's snapper

Biology
Dorsal spines (total): 10; Dorsal soft rays (total): 12; Anal spines: 3; Anal soft rays: 9. Head blunt. Interorbital space flat. Eye large. Preorbital bone relatively narrow. Snout short. Lower jaw protruding. Pectoral fins short, not reaching level of anus. Lower lobe of caudal fin with some rays excessively produced and filamentous in young. Scale rows on back parallel to lateral line. Overall color rosy red with a yellowish tinge; the dorsal fin grayish, the outer edge of its spinous portion black; the outer edge of the pelvic fins also black.

Classification

Classified By

Fourmanoir, 1970

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Snappers (Lutjanidae)

Distribution

Region

Pacific Ocean

Distribution

Pacific Ocean: known only from the Hawaiian Islands, Cook Islands, New Caledonia, and Okinawa, Japan but probably widespread in the area. Recently recorded from Tonga (Ref. 53797). Eastern Indian Ocean: Scott Reefs, northwestern Australia (Ref. 82665).

Range

31°N - 28°S, 124°E - 149°W

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

150 m

Depth To - meters

300 m

Zone

benthopelagic

Environment

Marine; benthopelagic; depth range 150 - 300 m (Ref. 55)

Trophic Level

3.93 s.e. 0.51 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

50.0 cm

Common Length

40.0 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

Moderate to high vulnerability (47 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated