Scarus prasiognathos   Valenciennes,  1840 (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Randall, J.E.

Size: 50-70 cm.

Color: 2 adult color phases; initial phase- reddish-brown to brown, becoming paler posteriorly on caudal peduncle with numerous whitish spots on unequal size (many scales with 2 or 3 which may vary in intensity); head brownish red with few scattered dark green dots and a narrow bridle-like dark green band passing from chin almost to orbital; median and pelvic fins dull orange, the margins of the dorsal and anal fins and upper and lower edges of caudal fin bluish grey; caudal fin with some small blue-green spots centrally and basally; dental plates green in both color phases ; terminal phase - body dark greenish, the edges of the scales dull orange; entire cheek and opercle below level of lower edge of eye bright blue-green, head above cheek and broad region around mouth abruptly orange; a blue-green band from front of orbit to front of snout separated from blue-green of cheek by a band of orange from orbit to corner of mouth; dorsal fin blue with vertical streaks of orange on membranes; anal fin blue with a narrow band of orange; caudal fin pale blue-green with blue upper and lower margin and a broad sub marginal orange band in each lobe; pectoral fins with dark brown rays, paler distally, the leading edge blue; pelvic fins blue-green with a blue leading edge and orange streak on first ray.

Body depth contained 2.3 to 2.7 times in standard length. Teeth fused in upper and lower jaws to form dental plates; plates smooth, the individual teeth only visible at margins; upper jaw enclosing lower jaw with mouth closed; lips covering 1/2 to all of dental plates; 0 to 2 canines posteriorly on upper dental plates. Scales large. Median predorsal scales 6, 3 scale rows on cheek, with 1-3 scales in ventral row. Caudal fins emarginate in initial phase to deeply concave in large terminal phase. Lips nearly covering dental plates, terminal males with 0-2 canines posteriorly on side of upper plate, none on lower. The initial phase closely resembles that of S. altipinnis. The terminal phase has the distinctive brilliant green throat and lacks the filamentous middle dorsal spine. Dorsal spines (total): 9-9, Dorsal soft rays (total): 10-10, Anal spines: 3, Anal soft rays: 9.

Synonym (s)
Scarus chlorodon Jenyns 1842
Scarus janthochir Bleeker, 1853
Scarus singaporensis Bleeker, 1852
Callyodon janthochir (Bleeker, 1853)
Callyodon janthocir (Bleeker, 1853)
Callyodon singaporensis (Bleeker, 1852)
Pseudoscarus janthochir (Bleeker, 1853)
Pseudoscarus singaporensis (Bleeker, 1852)
Scarus prasiognathus Valenciennes, 1840

Common Name (s)
• Singapore parrotfish (English)
Economic Importance and Threats
Importance:  Commercial
(Fisheries, aquarium)

Habitat:  Reef Associated
Trophic Level:  Primary Consumer
Prey:  Benthic algae


• Lakshadweep INDIA
• Andaman and Nicobar Islands INDIA

Literature Source(s)
  • Rao, DV; Devi, K and Rajan, PT (2000) An account of ichthyofauna of Andaman and Nicobar Islands, Bay of Bengal Occasional paper no 178 Records of the Zoological Survey of India ZSI, Calcutta 1-434 Available at - NCL, Pune
  • Allen, GR and Mohammed, A (2003) Coral Reef Fishes of Indonesia Zoological Studies 42(1) 26299 Available at - Digital Information Resource Center, Pune.
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Fischer, W and Bianchi, G (Eds.) (1984) FAO species identification sheets for fishery purposes. Western Indian Ocean (Fishing Area 51) FAO, Rome 3 Available at -
  • Talwar, PK (1990) Fishes of Andaman and Nicobar Islands: A synoptic survey Journal of the Andaman Science Association Andaman Science Association, Port Blair 6(2) 71-102 Available at - NIO,Goa

Page last updated on:2011-08-09

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