Silver Grunter

Eggs are guarded and fanned by the male parent (Ref. 205).

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): 12; Dorsal soft rays (total): 10 - 11; Analspines: 3; Analsoft rays: 8 - 9

Inhabits coral reefs (Ref. 58534). Omnivore (Ref. 75154).

Adults inhabit inshore areas near mangroves. Occur in lentic and lotic freshwater (Ref. 7300). Juveniles commonly found in the lower sections of creeks and may penetrate several kilometers into fresh water (Ref. 2847, 44894). Omnivore. Eggs are guarded and fanned by the male parent (Ref. 205).

fisheries: minor commercial; price category: unknown; price reliability:

分布於西太平洋區，由日本至澳洲之昆士蘭，東至新加勒多尼亞。台灣產於東部及蘭嶼較清澈之河川下游及河口區。

一般以待袋網、立桿網或手釣捕獲。罕見之種，較無食用經濟價值。

體高而側扁，呈長橢圓形；頭略呈三角形，頭背平直；體背部輪廓遠凸於腹部輪廓，腹部輪廓較平直。口中大，前位，上頜明顯前突。前鰓蓋骨後緣具鋸齒；鰓蓋骨上具2棘，下棘較大而尖銳，上棘細弱。體被細小櫛鱗，頰部及鰓蓋上亦被鱗；背及臀鰭基部具鱗鞘。背鰭連續，硬棘部與軟條部間具缺刻，硬棘XI，軟條數10；臀鰭硬棘III，軟條數8-9。體呈銀白色，體背側銀灰色。幼魚體側具4條細長的黑色縱帶，最上方一條由背鰭起點前方至背鰭軟條部的基底，最下方一條由口角延伸至臀鰭基部後緣，隨著成長，黑色縱帶逐漸消失不顯。背、胸、尾鰭淡黃色；腹、臀鰭灰白色。

主要棲息於河川下游及河口區。游泳能力佳，常成群溯游。偏肉食性，主要以小型水生昆蟲及底棲的無脊椎動物為食。