Whitemargin unicornfish (Naso annulatus)

Scientific name: Naso annulatus Quoy & Gaimard, 1825

The Whitemargin unicornfish (Naso annulatus) is a marine fish of the family Acanthuridae. In the aquarium it needs water at 24–28°C (75–82°F). Native range: Indo-Pacific, East Africa, including the Mascarene Islands to the Hawaiian, Marquesan, and Tuamoto islands, north to southern Japan, south to Lord Howe Island.

Whitemargin unicornfish care at a glance

Temperature: 24–28°C (75–82°F)

Biology

Dorsal spines (total): 5; Dorsal soft rays (total): 28-29; Anal spines: 2; Anal soft rays: 27 - 28. Plain brown or olivaceous in color, paler below; subadults with black caudal rays, narrow margins and white caudal filaments; pectoral fins with white distal margins.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name: Naso annulatus
Family: Acanthuridae (Surgeonfishes, tangs, unicornfishes)
Order: Perciformes (Perch-like fish)
Class: Actinopterygii (Ray-finned fishes)
Maximum length: 100.0
Depth range: 1–60 m (3–197 ft)
Environment: Marine; reef-associated; depth range 1 - 60 m, usually 25 - 60 m
Climate: Tropical
Distribution: Indo-Pacific: East Africa, including the Mascarene Islands to the Hawaiian, Marquesan, and Tuamoto islands, north to southern Japan, south to Lord Howe Island.
Conservation status (IUCN): Not Evaluated
Threat to humans: Reports of ciguatera poisoning
Uses: Aquarium: commercial
Resilience: Low, minimum population doubling time 4.5 - 14 years (K=0.213; Tmax=23)