Siganus argenteus   (Quoy & Gaimard,  1825) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Trevor, M.

Size: 25-35 cm.

Color: Deep sea blue above to paler blue below; head and trunk usually covered with small yellow spots, bars and commas, much larger than interspaces and quarter to half size of pupil; frequently spots joining to form horizontal wavy lines, particularly on lower sides. Iris plain yellow. In life, dorsal spines and rays and midline of trunk at base of dorsal fin yellow, expanding into a yellow saddle on caudal peduncle. Caudal fin dusky blue (bars on outer rays in some specimens); spinous part of anal fin mottled with white, yellow and brown; membrane of soft part of anal fin silvery, rays mottled light and dark brown; pelvic fins with 5 whitish, alternating with 4 dusky, crossbars; pectoral fins hyaline yellow. Colors fade rapidly at death so that head and trunk may be solid brown. Prejuveniles are said to be yellow brown to silver below; fins hyaline.

Body oval and compressed, slender, fusiform, its depth contained 2.4 to 3 times in standard length. Dorsal profile of head not descending steeply, head small, profile pointed; anterior nostril with a long flap reaching to or past posterior nostril. A forward directed spine present in front of dorsal fin, imbedded in nape; longest dorsal spine 3rd to 8th; last dorsal spine very short, contained 2.4 to 3.4 times in the longest; last anal spine the shortest, 2 to 3.2 times in the longest (3rd) anal spine; caudal fin deeply forked, with pointed lobes, median rays one third to half the length of longest rays. Scales minute; anterior half of cheek scaled; 16 to 22 scale rows between lateral line and bases of leading dorsal spines. Prejuveniles (smaller than 7 cm SL): greatest body depth nearly 4 times in standard length; anterior nostril flap reaches only halfway to posterior nostril; caudal fin less deeply forked; scales absent.

Synonym (s)
Siganus rostratus (Valenciennes, 1835)

Common Name (s)
• Roman Nose Spinefoot (English)
• Streaked Spine foot (English)
• Silver Rabbitfish (English)
• Rabbitface Spinefoot (English)
• Forktail Rabbitfish (English)
• Streamlined Spinefoot (English)
Economic Importance and Threats
Importance:  Commercial, Dangers
(Fisheries, aquarium

Habitat:  Reef Associated, Coastal
Trophic Level:  Secondary Consumer
Prey:  Zoobenthos, plants, other benthic invertebrates, benthic algae/weeds
Predator:  Epinephelus merra


• Andaman and Nicobar Islands INDIA
• Lakshadweep 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
  • Devi, K and Rao, DV (2003) Poisonous and venomous fishes of Andaman Islands, Bay of Bengal Occasional paper no 211 Records of The Zoolgical Survey of India ZSI, Calcutta 25934 Available at - NCL, Pune
  • UNEP World Conservation Monitoring Centre Available at -
  • Devi, K and Rao, DV (2003) A field guide to the fishes of Acanthuridae (surgeonfishes) and Siganidae (rabbitfishes) of Andaman and Nicobar Islands 42 Available at - NCL, Pune
  • Rouphael, T; Turak, E and Jon, B Seagrasses and mangroves of Yemen's Red Sea 41-89
  • Heemstra, E; Heemstra, P; Smale, M; Hoopers, T and Pelicier, D (2004) Preliminary checklist of coastal fishes from the Mauritian island of Rodrigues Journal of natural history Taylor and Francis 38(23-24) 3315 - 3350 Available at - index/
  • Kemp, JM (1998) Zoogeography of the coral reef fishes of the Socotra Archipelago Journal of Biogeography 25 919-933
  • Mark, SD and Jarvis, GE (2002) The impact of the 1998 coral mortality on reef fish communities in the Seychelles Marine Pollution Bulletin 44 309-321 Available at - NCL, Pune
  • Chabanet, P and Patrick, D (2005) Reef Fish Inventory of Juan De Novas Natural Park (Western Indian Ocean) Western Indian Ocean Journal Marine Sciences 2005 WIOMSA 4 145-162
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at -
  • Fischer, W and Bianchi, G (Eds.) (1984) FAO species identification sheets for fishery purposes. Western Indian Ocean (Fishing Area 51) FAO, Rome 4 Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Rao, DV and Devi, Kamlahttp:// (1996) Notes on rabbit fishes (Family: Siganidae) of Andaman and Nicobar islands Journal of Andaman Science Association Andaman Science Association, Central Agricultural Research Institute, Andaman, India 12 (1-2) 84-88 Available at - NIO, Goa

Page last updated on:2011-10-07

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