Classification / Names
Common names from other countries
Size / Weight / Age
Max length : 40.0 cm TL male/unsexed; (Ref. 9813); common length : 25.0 cm TL male/unsexed; (Ref. 9813)
Length at first maturity
Lm 5.6  range ? - ? cm
Marine; brackish; reef-associated; oceanodromous (Ref. 51243); depth range 1 - 50 m (Ref. 9813)
Climate / Range
Tropical, preferred ?; 42°N - 37°S, 90°E - 171°E
Western Pacific: southern Korea, southern Japan, Ogasawara Islands, Taiwan, southern China, Malaysia, Singapore, Thailand, Andaman Islands, Indonesia, Philippines, Yap, Palau, Pohnpei (Caroline Islands), Solomon Islands, Papua New Guinea, Vanuatu, New Caledonia, and Australia. Often misidentified as Siganus canaliculatus (Ref. 2334).
Countries | FAO areas | Ecosystems | Occurrences | Introductions
soft rays: 9;
Vertebrae: 13. Body olive green or brown above, silvery below; fish frequently with a dark patch below origin of lateral line. Adults become mottled when frightened. Slender, pungent, venomous spines. Preopercular angle 89°-95°. Lower half to 2/3 of cheeks commonly covered with weak, scattered scales. Midline of thorax between pelvic ridges. Differs from S. argenteus in details of coloration and less deeply forked tail (Ref. 37816).
IUCN Red List Status (Ref. 90363)
Fisheries: commercial; aquaculture: commercial
Estimates of some properties based on models
Phylogenetic diversity index
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)
2.0 ±0.1 se; Based on diet studies.
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Low vulnerability (21 of 100)