Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Siganidae
Etymology: Siganus: Latin, siganus = a fish, rabbit fish; by the similarity of the nose (Ref. 45335). More on author: Forsskål.
Environment / Climate / Range
Marine; brackish; reef-associated; depth range ? - 30 m (Ref. 50672). Subtropical; 32°N - 35°S
Length at first maturity / Size / Weight / Age
Maturity: Lm 13.7  range ? - ? cm
Max length : 27.0 cm TL male/unsexed; (Ref. 50671); common length : 20.0 cm TL male/unsexed; (Ref. 30573)
soft rays: 9;
Vertebrae: 23. Upper body gray, green or brownish, silvery below; iris iridescent silver or golden. Body color patterns extend to the fins. Spines slender, pungent and venomous. Preopercular angle 88°-96°; cheeks scaled; midline of thorax, isthmus and midline of belly without scales. Frightened fish become mottled or with 6 diagonal zones across side. Tip of broad-based flap of anterior nostril reaching at least halfway to orifice of posterior nostril.
Western Indian Ocean: several localities in East Africa, and from the Red Sea to the eastern Mediterranean via the Suez Canal.
Inhabits shallow waters and generally in schools of 50 to several hundred individuals; prefers protected areas. Feeds by grazing on algae.
Woodland, D.J., 1990. Revision of the fish family Siganidae with descriptions of two new species and comments on distribution and biology. Indo-Pac. Fish. (19):136 p.
IUCN Red List Status (Ref. 90363)
Fisheries: minor commercial; aquaculture: commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01124 (-0.08144 - 0.10392), b=3.00 (2.94 - 3.06), based on LWR estimates for species & genus-BS (Ref. 93245
Trophic Level (Ref. 69278
): 2.0 ±0.0 se; Based on diet studies.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.22, tm=1-2).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (32 of 100) .