Scientific Name
Lethrinus erythropterus

Common Name
Longfin emperor

Biology
Dorsal spines (total): 10; Dorsal soft rays (total): 9; Anal spines: 3; Anal soft rays: 8. The caudal fin is only slightly forked with the tips rounded. The inner surface of the pectoral fin is densely scaled; the posterior angle of the operculum is fully scaled. The head and body is brown or rust red, becoming lighter ventrally. Sometimes there are two light bars on the peduncle. A broad white streak originates from the eye and ends at the tip of the snout. The lips and the base of the pectoral fin are red. The fins are reddish, often bright red or orange.

Classification

Classified By

Valenciennes, 1830

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Emperors or scavengers (Lethrinidae)

Distribution

Region

Indo-West Pacific

Distribution

Indo-West Pacific: Tanzania and Mozambique to Papua New Guinea, Palau, and Caroline Islands. Recently reported from the Penghu Islands (Ref. 55073).

Range

25°N - 25°S

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

2 m

Depth To - meters

25 m

Zone

reef-associated

Environment

Marine; reef-associated; non-migratory; depth range 2 - 25 m (Ref. 9710)

Trophic Level

3.70000004768372 s.e. 0.51 Based on food items.

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

True

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

50.0 cm

Common Length

30.0 cm

Phylogenetic Diversity Index

PD50 = 0.5000 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 vulnerability (37 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