Inhabits coastal to outer reef slopes, usually swimming along upper edges of drop-offs in small schools . Descends from the water column to the reef front to be cleaned by Labroides dimidiatus . Feeds on benthic algae . Forms aggregations, feeding on zooplankton well above the bottom over or in the immediate vicinity of reefs. Males exhibit rapid and striking changes in color pattern during courtship .
Dorsal spines (total): 5; Dorsal soft rays (total): 28 - 30; Anal spines: 2; Anal soft rays: 28. Fresh specimens with yellow caudal fin and blackish peduncular plate; preserved specimens uniform grey in color and dark fins (pectorals pale). Oblique groove on side of snout below nostrils, its length about equal to length of naked area enclosing nostrils (Ref 9808). : fusiform / normal; Cross section: compressed.
Behavioural data for Slender unicorn is currently being reviewed.
Diet information for Slender unicorn is currently being compiled.
Reproduction data for Slender unicorn is currently being compiled.
Marine; reef-associated; depth range 8 - 55 m . Tropical West Pacific: Mozambique to the Philippines.
benthic algae (Ref
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Axinurus minor | Smith | 1966 | Synonym |
| Naseus unicolor | Günther ex Liénard | 1861 | Synonym |
| Naso unicolor | Liénard | 1861 | Synonym |
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 2 records indexed .
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