Photo. (c) 2019 John Nevill.
Photo. (c) 2019 John Nevill.
Photo. (c) 2019 John Nevill.
Scientific Name: Naso thynnoides
English Name: Oneknife unicornfish
Creole Name: Korn
French Name:
IUCN Red List Status: Least Concern (LC)
Description:
Dorsal spines: 4; Dorsal rays: 28-30; Anal spines: 2; Anal rays: 27-29.
Body oval and elongate. Grey, paler ventrally, with narrow dark bluish-grey bars on body and irregular spots on head. Oblique groove on snout below nostrils reaching
half way from eye to mouth. A broad diffuse yellow stripe on side of body. Single dusky peduncular plate with semi-circular keel. Caudal fin emarginated and bluish grey.
Size:
Maturity: Lm unknown. Range unknown. Max Length: 40cm FL
Habitat and Ecology:
Reef associated occurring in lagoons to outer seaward reefs (depth 2-40m, typically more than 10m). Occurs singly or in schools. Feeds on zooplankton and algae.
Sleeps on reefs at night, taking on a disruptive mottled pattern.
Fishery Status:
This species is not protected or subject to fishery regulations. It is a rare component of the catch.
Notes:
The colour of the photo’d specimen has been altered by storage on ice.
References:
Abesamis, R. et al. (2012). Naso thynnoides. The IUCN Red List 2012: e.T177980A1509761. http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T177980A1509761.en. (16/10/18).
Froese, R. & D. Pauly. Eds. (2018). FishBase. https://www.fishbase.de/summary/Naso-thynnoides (16/10/18)
Randall, J.E. (2001). Surgeonfishes of Hawaii and the World. ISBN: 1-56647-561-9
Citation:
Nevill, J.E.G. (2019). Naso thynnoides, Oneknife unicornfish. Seychelles Seatizens. www.seatizens.sc. https://seatizens.sc/species/naso-thynnoides-cuvier-1829/ (edited 17/06/22).