Cetoscarus ocellatus (Valenciennes, 1840)
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Cetoscarus ocellatus (Valenciennes, 1840)

Genus: ,

Scientific Name: Cetoscarus ocellatus

English Name: Spotted parrotfish

Creole Name: Kakatwa

French Name: Perroquet bicolore

IUCN Red List Status: Least Concern (LC)

Description:

Dorsal spines 9, dorsal rays 10. Anal spines 3, anal rays 9.

3 rows of scales on cheek; nodular outer surface of dental plates; conical teeth absent on side of dental plates; lips largely covering dental plates; long snout; juveniles with rounded caudal fin, emarginate in adults.

Juveniles: white with a broad orange band around the head, a black ocellus on the dorsal fin and broad orange submarginal band on the tail.

Initial phase: head purplish to reddish brown, finely spotted with black ventrally; body with a broad, pale yellowish zone dorsally, bluish gray below; scales rimmed and spotted with black; median fins brownish red and caudal with a whitish crescent posteriorly.

Terminal males: green, scales rimmed with pink, head and anterior body with numerous small pink spots. An orange line from corner of the mouth to pectoral base and across upper abdomen, where solid green with broad, pink, longitudinal ventral band; juveniles white with a broad, dark-edged orange bar covering head except snout and chin, a large, orange-rimmed black spot anteriorly in dorsal fin, and a broad, submarginal orange band in caudal fin.


Size:

Maturity: Lm 30cm TL. Range unknown. Max Length: 80cm SL.


Habitat and Ecology:

Large excavating parrotfish inhabiting seaward reefs and clear lagoons (depth 1-35m). Small juveniles usually in dense coral and algae habitats. Occurs in haremic groups, a dominant male with a group of females. Oviparous, distinct pairing during breeding. The male which maintains large territory. If the male disappears, the dominant female changes sex and colour to become a brightly-coloured male. Grazes on algae.


Fishery Status:

This species is not protected or subject to fishery regulations. It is caught in the fish trap fishery, but is an uncommon to rare component of the catch. Terminal males are an exceedingly rare sight at Victoria market, but are apparently more frequently encountered in the Praslin artisanal catch. 


Notes:
References:

Bray, D.J. 2017. Cetoscarus ocellatus in Fishes of Australia, accessed 12 Mar 2019, http://fishesofaustralia.net.au/home/species/390
Choat, J.H. et al 2012. Cetoscarus ocellatus. The IUCN Red List 2012: e.T190691A17792863. http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T190691A17792863.en. (12/03/19).
Froese, R. & D. Pauly. Eds. 2018. FishBase. https://www.fishbase.se/summary/66097 (12/03/19).


Citation:

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