Short-nosed unicornfish

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Short-nosed unicornfish
Acanthuridae - Naso brevirostris-001.JPG
Naso brevirostris at the French Polynesia

Least Concern (IUCN 3.1)[1]
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acanthuriformes
Family: Acanthuridae
Genus: Naso
Species:
N. brevirostris
Binomial name
Naso brevirostris
(G. Cuvier, 1829)
Synonyms
  • Cyphomycter coryphaenoides Smith, 1955
  • Naseus brevirostris Cuvier, 1829
  • Naseus brevirostris Valenciennes, 1835
  • Naso brevirostris (Valenciennes, 1835)

The short-nosed unicornfish (Naso brevirostris) [2] is a species of unicornfish in the family.

Distribution[]

Naso brevirostris is widespread throughout the Indian and Pacific Oceans.[2][3] Another species, Naso maculatus, may also be called the spotted unicornfish.

This species is listed as "least concern" on the IUCN Red List of Threatened Species, and there are no observed declines as a result of commercial or recreational fishing. [4]

Habitat[]

The short-nosed unicornfish dwells in mid-waters along steep outer lagoon, in rocky shore and seaward reef drop-offs,[2] and prefers water temperatures ranging from 22.4 to 29° Celsius.[5]

The short-nosed unicornfish can be easily found in the coral reef area around Green Island, Taiwan

Description[]

Naso brevirostris can reach a maximum length of 60 centimetres (24 in).[2] These fishes have an elongate, oval body, with a short snout and a small, protrusible mouth. They are olivaceous brown to bluish grey in color,[2] with a prominent horn, many small dark spots on head and short irregular lines on sides of body. The anterior part of the body is rather pale.[2] The tail is whitish with dark blotch. The caudal knives are relatively larger in males (sexual dimorphism).[4] These fishes have six dorsal spines, 27-29 dorsal soft rays and 27-30 anal soft rays. Subadults show dark spots on head and body, while juveniles lack the prominent horn.[5]

Biology[]

This species forms spawning aggregations.[4] Adults feed on algae and zooplankton, while juveniles mainly feed on benthic algae.[5]

Gallery[]

  • Spotted unicornfish at the Toledo Zoo

  • At the Dubai Aquarium

References[]

  1. ^ Abesamis, R.; Clements, K.D.,; Choat, J.H.; McIlwain, J.; Myers, R.; Nanola, C.; Rocha, L.A.; Russell, B.; Stockwell, B. (2012). "Naso brevirostris". IUCN Red List of Threatened Species. 2012: e.T177990A1513480. doi:10.2305/IUCN.UK.2012.RLTS.T177990A1513480.en.CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors list (link)
  2. ^ a b c d e f Froese, Rainer; Pauly, Daniel (eds.) (2006). "Naso brevirostris" in FishBase. April 2006 version.
  3. ^ "Spotted unicornfish - Aquarium Community".
  4. ^ a b c IUCN
  5. ^ a b c "Naso brevirostris; Overview Short-nosed Unicornfish".

External links[]


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