Gray Unicornfish

Bluish grey to grey-brown, capable of displaying a colour pattern of vertically elongate blotches (lighter or darker than ground colour) on side and upper part of body. Opercular and preopercular margins not dark brown. Caudal fin uniform in colour. Gill rakers on lower limb of gill arches entirely pale. Edge of lower lip not white (Ref 9808).Description: Characterized further by absence of horn or protuberance; caudal peduncle with pair of bony plates, blade-like keels not pointed; greatest depth of body 2.5-3.0 in SL (Ref. 90102).

Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 27 - 30; Analspines: 2; Analsoft rays: 28 - 31

Benthopelagic over coral and rock (Ref. 58302). Occurs singly or in aggregations along clear seaward and outer lagoon reefs and channels (Ref. 37816). Feeds in midwater on zooplankton (Ref. 90102).

Naso caesius, the gray unicornfish, is a tropical fish found in coral reefs in the Pacific Ocean.