Actinopteri (ray-finned fishes) > Acanthuriformes
(Surgeonfishes) > Acanthuridae
(Surgeonfishes, tangs, unicornfishes) > Nasinae
Etymology: Naso: Latin, nasus = nose (Ref. 45335). More on author: Herre.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 20 - 50 m (Ref. 90102). Tropical; 30°N - 12°S
Western Pacific: southern Honshu, Japan to the Great Barrier Reef and New Caledonia. Reported from the Similan Islands in the Andaman Sea and Guam. Recently recorded from Tonga (Ref. 53797).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 60.0 cm SL male/unsexed; (Ref. 48637)
soft rays: 26 - 30. Lacks a horn, has numerous black close-set spots on the upper half of its body and tail, and is white ventrally. Body elongate, its depth 3.3 to 3.7 times in SL (Ref 9808).
Inhabits coastal to outer reef slopes subject to strong currents. Sometimes in large schools (Ref. 48637). Generally uncommon species found in steep outer reef drop-offs (Ref. 9710). Usually found in waters deeper than 6 m. Feeds on zooplanktons (Ref. 90102). Solitary or in groups (Ref. 37816).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Myers, R.F., 1991. Micronesian reef fishes. Second Ed. Coral Graphics, Barrigada, Guam. 298 p. (Ref. 1602)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Fisheries: commercial; aquarium: commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 24.4 - 28.5, mean 27.6 °C (based on 73 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01995 (0.00914 - 0.04356), b=3.00 (2.82 - 3.18), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 2.9 ±0.33 se; based on food items.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (52 of 100) .