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Siganus luridus (Rüppell, 1829) Dusky spinefoot |
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photo by
Wirtz, P. |
| Family: | Siganidae (Rabbitfishes) | |||
| Max. size: | 30 cm TL (male/unsexed) | |||
| Environment: | reef-associated; marine; depth range 2 - 40 m | |||
| Distribution: | Western Indian Ocean: Persian Gulf (Ref.80050); Red Sea and East Africa to islands in the western Indian Ocean. Immigrant to Mediterranean via the Suez Canal. | |||
| Diagnosis: | Dorsal spines (total): 13-14; Dorsal soft rays (total): 10-10; Anal spines: 7-7; Anal soft rays: 9-9; Vertebrae: 13-13. 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. | |||
| Biology: | Found in small schools in very shallow water close to the bottom. Prefer hard bottoms of compacted sand with rock or coral debris. Solitary adults and groups of 3 or 4 adults have also been observed. Feed on a wide range of benthic algae. May suddenly stop and erect its fins (dorsal, anal and pelvic) presenting an encircling array of spines to potential predators; these spines are venomous. A food fish that is occasionally poisonous (Ref. 4537). Probably does not adapt well in captivity (Ref. 12382). A thermophilic species (Ref. 120766). Minimum depth from Ref. 9710. | |||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 19 July 2017 Ref. (130435) | |||
| Threat to humans: | venomous | |||