Naso caeruleacauda, Blue unicorn

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Naso caeruleacauda Randall, 1994

Blue unicorn
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Naso caeruleacauda   AquaMaps   Data sources: GBIF OBIS
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Image of Naso caeruleacauda (Blue unicorn)
Naso caeruleacauda
Picture by Randall, J.E.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Acanthuriformes (Surgeonfishes) > Acanthuridae (Surgeonfishes, tangs, unicornfishes) > Nasinae
Etymology: Naso: Latin, nasus = nose (Ref. 45335).
More on author: Randall.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; reef-associated; depth range 15 - 45 m (Ref. 90102). Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Western Central Pacific: Philippines and Indonesia.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 40.0 cm SL male/unsexed; (Ref. 48637); max. published weight: 1.1 kg (Ref. 125599)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 4 - 5; Dorsal soft rays (total): 28 - 30; Anal spines: 2; Anal soft rays: 29. No narrow dark bars on body. Caudal fin blue in life. Dorsal profile of head from above upper lip to above centre of eye straight. Anterior interorbital region and adjacent space between nostrils strongly convex. Body depth 2.75 to 2.8 times in SL (Ref 9808).
Body shape (shape guide): fusiform / normal; Cross section: compressed.

Biology     Glossary (e.g. epibenthic)

Found in schools, mainly along outer reef walls to moderate depths in pursuit of plankton (Ref. 48637).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Randall, John E. | Collaborators

Randall, J.E., 1994. Unicornfishes of the subgenus Axinurus Perciformes: Acanthuridae: Naso), with description of a new species. Copeia 1994(1):116-124. (Ref. 10671)

IUCN Red List Status (Ref. 130435: Version 2025-1)

  Least Concern (LC) ; Date assessed: 04 May 2010

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

More information

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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search | Zoobank | Zoological Record

Estimates based on models

Preferred temperature (Ref. 123201): 26.5 - 29.1, mean 28 °C (based on 88 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02089 (0.01210 - 0.03607), b=2.95 (2.80 - 3.10), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic level (Ref. 69278):  2.3   ±0.1 se; based on size and trophs of closest relatives
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (39 of 100). 🛈
Nutrients (Ref. 124155):  Calcium = 43.9 [26.9, 85.0] mg/100g; Iron = 0.584 [0.301, 1.009] mg/100g; Protein = 18.6 [17.4, 19.6] %; Omega3 = 0.125 [0.079, 0.230] g/100g; Selenium = 33.8 [17.9, 60.1] μg/100g; VitaminA = 60.2 [18.6, 193.1] μg/100g; Zinc = 1.6 [1.1, 2.3] mg/100g (wet weight);