Orangetail filefish (Pervagor aspricaudus) is a ray-finned fish of the family Monacanthidae. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 13 cm. It occurs at depths between 1 and 25 metres. With a trophic level of 2.9, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.
Dorsal spines (total): 1 - 2; Dorsal soft rays (total): 31 - 35; Anal spines: 0; Anal soft rays: 28 - 32. First dorsal spine strong. Posterior margin of ventral flap narrowly attached to large pelvic fin rudiment. Scale spinulation in midbody not closely packed. Body and head color variable; orange to brown iris; caudal fin yellow or orange; soft dorsal and anal fins clear to yellowish; spinous dorsal dark brown to brownish orange; pectorals clear. Numerous spots in head and body appear as dashes or lines Male scale ridge rugosities usually develop at about 60 mm SL.: short and / or deep; Cross section: compressed.
Behavioural data for Orangetail filefish is currently being reviewed.
Marine; reef-associated; depth range 1 - 25 m . Tropical; 31°N - 23°S West Pacific: Mauritius, Christmas Island, southern Japan, Marcus Islands, southern Taiwan, Australia, New Caledonia, Marshall Islands, Johnston Island, and Hawaiian Islands; distribution anti-equatorial.
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