This species is usually encountered in clear water over coral reefs at depths between about 12 and at least 45 m. Habitats include both gradually sloping bottoms and steeper drop-offs, but in the former case it was restricted to depths greater than 20 m in the vicinity of isolated, small patch reefs. Generally, this species forms aggregations ranging from just a few fish to at least 20-30 individuals, feeding on plankton up to several meters above the bottom. The fish retreat to caves, crevices, and ledges when approached closely by divers . Life history characteristics for the family specify that this species is oviparous, with distinct pairing during breeding . Eggs are demersal and adhere to the substrate . Males guard and aerate the eggs .
Dorsal spines (total): 13; Dorsal soft rays (total): 12; Anal spines: 2; Anal soft rays: 11 - 12; Vertebrae: 26. This species is distinguished by the following characters: DXIII,12; A II,11 (rarely 12); pectoral rays 19 (rarely 18); spiniform caudal rays 3; tubed lateral line scales 16-17; gill rakers 6-7 + 19-21 (total, 26-28); body depth 1.9-2.0 in SL; colour when alive is mainly golden brown with yellowish caudal fin and pale bluish-grey pelvic fins .: short and / or deep; Cross section: compressed.
Behavioural data for Yellow-brown chromis is currently being reviewed.
Diet information for Yellow-brown chromis is currently being compiled.
Life history characteristics for the family specify that this group is oviparous, with distinct pairing during breeding . Eggs are demersal and adhere to the substrate . Males guard and aerate the eggs .
Marine; reef-associated; depth range 12 - 50 m . Tropical Indian Ocean: Maldive Islands and Chagos Archipelago to off the Andaman Sea coast of Thailand; and Indonesia; probably Andaman and Nicobar Islands, and Mergui Archipelago, off Myanmar.
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