Dussumier'S Thryssa

Belly with 21 to 24 keeled scutes from isthmus to anus. Maxilla very long, reaching at least halfway along pectoral fin and to pelvic fin base in adults; first supra-maxilla absent; lower jaw slender. gill rakers with serrae on the inner edge in distinct clumps. A dark blotch behind upper part of gill opening, sometimes joined to dark saddle on nape.

Amphidromous. Refers to fishes that regularly migrate between freshwater and the sea (in both directions), but not for the purpose of breeding, as in anadromous and catadromous species. Sub-division of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.Characteristic elements in amphidromy are: reproduction in fresh water, passage to sea by newly hatched larvae, a period of feeding and growing at sea usually a few months long, return to fresh water of well-grown juveniles, a further period of feeding and growing in fresh water, followed by reproduction there (Ref. 82692).

Dorsal spines (total): 0; Analspines: 0; Analsoft rays: 29 - 37

Inhabits coral reefs (Ref. 58534). Presumably schooling, mostly inshore, perhaps tolerating estuarine conditions. Feeds on diatoms when young (Ref. 189).

Coastal pelagic (Ref. 68964). Presumably schooling, mostly inshore and perhaps tolerating estuarine conditions. Feeds on diatoms when young and prawn larvae, copepods and cypris when larger. The number of museum specimens suggest that it is fairly common (but not in Bombay waters).

fisheries: commercial

分布於印度-西太平洋區，西起巴基斯坦、印度、印尼、馬來西亞至中國及臺灣等海域。臺灣分布於西部及澎湖海域。

主要漁法為焚寄網、底拖網及流刺網，全年可產，西部沿海產量較豐，體薄肉少，通常曬成魚乾出售，或製成魚粉作為飼料之原料。

體甚側扁，腹部在腹鰭前後均有一排銳利的稜鱗，腹鰭前15-16個，腹鰭後6-9個，共約21-24個。頭略小，側扁。吻鈍，吻長明顯短於眼徑。口大傾斜；上頜骨末端尖而略長，達胸鰭基部或略超出一些；第一鰓弓下枝鰓耙數26-32。體被圓鱗，鱗中大，易脫落，無側線；背鰭前方具1小棘，胸、腹鰭具腋鱗。背鰭起始於體中部，具14軟條；臀鰭長，具32-40分枝之軟條；尾鰭叉形。體背部青灰色，具暗灰色帶，側面銀白色；鰓蓋上方之頸部有暗色鞍狀斑。背鰭、胸鰭及尾鰭黃色或淡黃色；腹鰭及臀鰭淡色。

近沿海表層魚類，濾食浮游生物為生，具群游性。多於表層至20公尺深之海域活動，有時可發現於河口域。

Thryssa dussumieri, the Dussumier's thryssa, is a species of ray-finned fish in the family Engraulidae. It is found in the Indo-Pacific.