Common names:
Aguas, Agwas, Balanak
Occurrence:
native
Salinity:
freshwater
Abundance:
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Importance:
commercial
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Aquaculture:
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Regulations:
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Uses:
no uses
Comments:
Known from Puerto Princesa, Palawan (Ref. 58652). Reported from Lake Taal (Ref. 13446). Sold fresh and dried in Metro Manila markets and is one of the major dried products being sold. Roe is marketed as a salted product in the Visayas (Ref. 2858). Also Ref. 1602.
National Checklist:
Country Information:
https://www.cia.gov/library/publications/resources/the-world-factbook/geos/rp.html
National Fisheries Authority:
Occurrences:
OccurrencesPoint map
Main Ref:
Conlu, P.V., 1986
National Database:
Indo-Pacific: Red Sea and from East Africa to the Tuamoto Islands, north to southern Japan, south to southern Great Barrier Reef and New Caledonia (Ref. 9812).
サイズ / 重さ / 年齢
Maturity: Lm? range ? - ? cm Max length : 63.0 cm TL オス/雌雄の選別がない; (Ref. 9710); common length : 35.0 cm TL オス/雌雄の選別がない; (Ref. 9812)
背面の脊椎 (合計): 5; 背鰭 (合計): 8-10; 肛門の骨 3; 臀鰭: 7 - 9. Diagnosis: This species is distinguished by the following characters: robust body; usually with 16 pectoral-fin rays; 25-29 longitudinal scales; 16 circumpeduncular scales; weakly ctenoid scales; adults with longer snout than eye diameter, shorter in juvenile; poorly developed adipose eyelid, forming narrow rim around eye; weak notch on anteroventral edge of preorbital; truncate caudal fin; colour olive-brown dorsally, flanks and belly silvery to whitish; about 6 brownish stripes on flank formed by longitudinal marks on scales; fins yellowish white with dusky margins except caudal fin yellow and pectoral black dorsally and yellow ventrally (completely black in young); no axillary scale visible in the pectoral fins (Ref. 9812, 90102).
Found in lagoons, reef flats, estuaries, and coastal creeks, in shallow coastal areas and protected sandy shores (Ref. 40488). Usually within tidal influence, but may enter fresh water, ascending 10 km into rivers (Ref. 40488). Forms large schools, frequently in mangrove areas (Ref. 2334). Juveniles may be found in rice fields and mangroves and may be used as bait fish (Ref. 9812). Oviparous, eggs are pelagic and non-adhesive (Ref. 205). Feeds on phytoplankton, small algae and detritus organisms (Ref. 89972). Caught in cast nets, stake
nets, beach seines, and gill nets; marketed fresh and salted; boiled (Thailand), canned or frozen (Australia). Roe also marketed salted and juveniles used as bait fish (Ref. 9812)..
Life cycle and mating behavior 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
