Balistoides viridescens (Bloch & Schneider, 1801)
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Balistoides viridescens (Bloch & Schneider, 1801)

Genus:

Scientific Name: Balistoides viridescens

English Name: Titan triggerfish

Creole Name: Navitol

French Name: Baliste olivâtre

IUCN Red List Status: Not Evaluated (NE)

Description:

Dorsal spines: 3; Dorsal rays: 24-26; Anal spines: 0; Anal rays: 22-24.

Very distinctive contrasting pattern of colouration but actual colours can vary. Body is heavily scaled. The Scales have dark centres but size of dark centre varies over pale background that varies from white to yellow or orange. Hence body can appear dark with fine interstitial network of the paler colour or can appear white, yellow or orange with black patch on scales – typically darker dorsally. There is a black region with small yellow spots covering the eyes and extending to the pectoral fin bases. The dorsal, pectoral and anal fins have black margins. There is a naked area around the mouth with a black moustache bordered in white. Large white area below the mouth covering chin and throat.  Deep grove before the eye. About five rows of spines on the caudal peduncle.


Size:

Maturity: Lm unknown. Range unknown. Max Length: 75cm TL. Largest species of triggerfish.


Habitat and Ecology:

Lagoons, seaward reefs and sheltered inner reef slopes (depth 1-50m). Adults occur singly or in pairs. Juveniles often associated with isolated patches of branching coral or rubble in protected shallow sandy areas. Feed on sea urchins, coral, crabs and other crustaceans, molluscs and tube worms. Females renowned for aggressive behaviour when nest guarding and their strong teeth can inflict a painful injury.


Fishery Status:

This species is not protected or subject to fishery regulations. It is caught in the hand line fishery, but is a rare component of the catch. 


Notes:
References:

Bray, D.J. Balistoides viridescens in Fishes of Australia, accessed 31 Oct 2018, http://fishesofaustralia.net.au/home/species/762

Froese, R. & D. Pauly. Eds. 2018. FishBase https://www.fishbase.de/summary/balistoides-viridescens  (30/10/18)

McGrouther, M. (2013) Titan Triggerfish, Balistoides viridescens. Australian Museum. https://australianmuseum.net.au/titan-triggerfish-balistoides-viridescens-bloch-schneider-1801 (31/10/18).


Citation:

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