Gray unicornfish (Naso caesius) fish species and information / pictures of Gray unicornfish - Naso caesius

Gray unicornfish (Naso caesius) fish species information

Scientific Name
Naso caesius

Common Name
Gray unicornfish

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).

Classification

Classified By
Randall & Bell, 1992
Class
Ray-finned fishes (Actinopterygii)
Order
Perch-like fish (Perciformes)
Family
Surgeonfishes, tangs, unicornfishes (Acanthuridae)

Distribution

Region
Pacific Ocean
Distribution
Pacific Ocean: Northern Marianas, Marshall Islands, Hawaiian Islands, Pitcairn group, Society Islands (French Polynesia) and New Caledonia.
Range
Unknown

Environment

Climate
Tropical
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
3 m
Depth To - meters
36 m
Zone
reef-associated
Environment
Marine; reef-associated; depth range 3 - 36 m (Ref. 58302)
Trophic Level
2.29 s.e. 0.17 Based on size and trophs of closest relatives
Occurs in Marine / Salt water
True
Occurs in Brackish water
False
Occurs in Fresh Water
False
Occurs on Reefs
True
Is kept in Aquariums
False

Physical Size and Genetics

Maximum Length
45.6 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Unknown
Vulnerability
Moderate to high vulnerability (47 of 100)
Resilience
Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)
Threat To Humans
  Harmless
IUCN Red List Status
  Not Evaluated