Gray unicornfish (Naso caesius)

Scientific name: Naso caesius Randall & Bell, 1992

Gray unicornfish (Naso caesius)

The Gray unicornfish (Naso caesius) is a marine fish of the family Acanthuridae. Native range: Pacific Ocean, Northern Marianas, Marshall Islands, Hawaiian Islands, Pitcairn group, Society Islands (French Polynesia) and New Caledonia.

Biology

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

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Naso caesius
Family
Acanthuridae (Surgeonfishes, tangs, unicornfishes)
Order
Perciformes (Perch-like fish)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
45.6
Depth range
3–36 m (10–118 ft)
Environment
Marine; reef-associated; depth range 3 - 36 m
Climate
Tropical
Distribution
Pacific Ocean: Northern Marianas, Marshall Islands, Hawaiian Islands, Pitcairn group, Society Islands (French Polynesia) and New Caledonia.
Conservation status (IUCN)
Not Evaluated
Threat to humans
Harmless
Resilience
Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

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