Chromis Oligactis (Chromis oligactis) is a ray-finned fish of the family Pomacentridae. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 7.9 cm. It occurs at depths between 30 and 40 metres. With a trophic level of 3, it is a low-level carnivore, feeding on invertebrates and small organisms.
Dorsal spines (total): 14; Dorsal soft rays (total): 10; Anal spines: 2; Anal soft rays: 10; Vertebrae: 26. This species is distinguished from its congeners by the following set of characters: 14 spinous rays in D, 10 branched rays in D and A, 16-17 rays in P; 3 spiniform procurrent rays in the upper and lower lobe of C; 26 gill-rakers in the outer row on the first arch; 19 perforated scales in the anterior lateral line; maximum body depth, which fits 2.2 times in SL; a small dark spot at the base of P, without prominent light or black areas or a contrasting pattern on the body in preserved specimens .: short and / or deep; Cross section: compressed.
Behavioural data for Chromis Oligactis is currently being reviewed.
Marine; reef-associated; non-migratory; depth range 30 - 40 m . Tropical Central Pacific: Vietnam.
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