Siganus luridus   (Ruppell,  1829) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Wirtz, P

Size: 30.0 cm (Max length).

Color: Regional variation in color exists.

Anterior spines of median fins slender and pungent, posterior spines stout, all venomous including that on the nape. Preopercular angle 87-97 degrees. Anterior nostril with a long, broad flap covering posterior nostril when depressed. Variable cheek scalation. Midline of thorax devoid of scales between the pelvic ridges.
Feed on a wide range of benthic algae. May suddenly stop and erect its fins (dorsal, anal and pelvic) presenting an encircling array of spined to potential predators; these spines are venomous. Probably does not adapt well in captivity.

Synonym (s)
Amphacanthus abhortani Valenciennes, 1835
Amphacanthus luridus Ruppell, 1829
(senior synonym)
Teuthis lurida (Ruppell, 1829)
(senior synonym)
Siganus rivulatus (non Forsskal, 1775)
Siganus spinus (non Linnaeus, 1758)

Common Name (s)
• dusky spinefoot (English)
• squaretail rabbitfish (English)
• Spinefoot (English)
Economic Importance and Threats
Importance:  Commercial, Dangers
(Venomous; A food fish that is occasionally poisonous.)

Habitat:  Reef Associated, Rocky, Sandy



Literature Source(s)
  • Pillai, NGK (1995) Studies on some aspects of biology and ecology of coral reef fishes of Lakshadweep with observations on other coral reef ecosystems of India Mariculture Research under the Postgraduate Programme in Mariculture - Part 6 CMFRI Special Publication CMFRI 61 99-111 Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at -

Page last updated on:2010-12-15

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