Redbar triplefin (Enneapterygius niue) is a ray-finned fish of the family Tripterygiidae. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 2 cm. With a trophic level of 3.1, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.
Dorsal spines (total): 16 - 18; Anal spines: 1; Anal soft rays: 19 - 21. This medium-sized species of barred Enneapterygius is distinguished by the following characters: D2 XIII-XV; A 18-20; lateral-line scales 14-19 + 16-20; total lateral scale rows 33-36; proportional measurements in thousandths of SL - eye diameter 94-128, preorbital 50-75, body depth 176-206, preanal fin length 483-538; sides of body with two short and five complete bars; pectoral-fin base has a vertical dark bar; preorbital with an oblique dark band; dorsal fins are pale except for a dusky base; anal fin is dark grey in male and with four oblique brown bands in female; pelvic fins are white, caudal fin pale .: elongated; Cross section: oval.
Behavioural data for Redbar triplefin is currently being reviewed.
Diet information for Redbar triplefin is currently being compiled.
Reproduction data for Redbar triplefin is currently being compiled.
Marine; reef-associated. Tropical Pacific Ocean: Niue and Samoa.
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