Naso brachycentron  (Valenciennes, 1835)

Humpback unicornfish
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Naso brachycentron   AquaMaps   Data sources: GBIF OBIS
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Image of Naso brachycentron (Humpback unicornfish)
Naso brachycentron
Picture by Randall, J.E.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Acanthuridae (Surgeonfishes, tangs, unicornfishes) > Nasinae
Etymology: Naso: Latin, nasus = nose (Ref. 45335).

Environment / Climate / Range Ecology

Marine; reef-associated; depth range 2 - 20 m (Ref. 27115), usually 15 - 20 m (Ref. 48637).   Tropical; 25°C - 28°C (Ref. 27115); 33°N - 25°S

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 90.0 cm FL male/unsexed; (Ref. 1602)

Short description Morphology | Morphometrics

Dorsal spines (total): 4 - 5; Dorsal soft rays (total): 28-30; Anal spines: 2; Anal soft rays: 27 - 28. Distinctive humped back; horn only in adult males. A few scattered small dark-edged pale spots on postorbital head and body above pectoral fins. No white margin posteriorly on caudal fin. Profile of snout from mouth to eye strongly sloping, forming an angle of about 40° to horizontal axis of body (Ref 9808).

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

Indo-Pacific: East Africa to the Marquesan and Society islands, north to the Ryukyu Islands, south to Vanuatu.

Biology     Glossary (e.g. epibenthic)

Inhabits deep coastal, usually in small groups but occasionally in large schools (Ref. 48637). An uncommon species found in seaward reef slopes (Ref. 9710, 48637), also along rocky shores (Ref. 30573). Feeds on benthic algae (Ref. 30573). Caught with nets (Ref. 30573).

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

Myers, R.F., 1991. Micronesian reef fishes. Second Ed. Coral Graphics, Barrigada, Guam. 298 p.

IUCN Red List Status (Ref. 90363)

  Least Concern (LC) 

Threat to humans

  Harmless




Human uses

Aquarium: commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | National databases | Public aquariums | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on empirical models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02379 (-0.16030 - 0.20788), b=2.94 (2.85 - 3.03), based on LWR estimates for this genus-BS (Ref. 93245).
Trophic Level (Ref. 69278):  2.7   ±0.29 se; Based on food items.
Resilience (Ref. 69278):  Low, minimum population doubling time 4.5 - 14 years (K=0.429; tmax=31).
Vulnerability (Ref. 59153):  High to very high vulnerability (67 of 100) .
Price category (Ref. 80766):   Medium.