Thursday, March 19, 2015

New Caledonia 2013
Bluespine Unicornfish - Naso Unicornis

 :: THEME: Bluespine Unicornfish 
   :: ISSUE DATE: 8 June 2013
    ::  STAMP DESIGN: Jipe Le Bars

The bluespine unicornfish or short-nose unicornfish (Naso unicornis) is a tang from the Indo-Pacific. The bluespine unicorn or short-nose unicornfish is large unicornfish, reaching a length of up to 70 cm.

It is characterized by a bony horn projecting from the head in front of the eyes. The tail (in adults) is truncate with filamentous lobes. There are two blue plates bearing knife-like spines on either side of the caudal peduncle. Horn and caudal peduncule spines are better developed in males than in females. The dorsal fin has 6 spines and 27-30 soft rays, the anal fin 2 spines and 27-30 soft rays. The colour of the bluespine unicornfish is usually greenish-grey. The dorsal and anal fins are yellowish with thin blue lines. Bluespine unicorns are diurnal and are found singly, in pairs, or in small groups. They are omnivores feeding primarily on brown algae (Sargassum and Dictyota) and zooplankton. It occasionally makes its way into the aquarium trade. It is called kala in Hawaiian, and dawa in New Caledonia.