Barhead Pipefish

Males may be brooding at 11.25 cm SL (Ref. 5316).

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; Dorsal soft rays (total): 5363

Found in streams, rivers, and estuaries. Ovoviviparous (Ref. 205). The male carries the eggs in a brood pouch which is found under the tail (Ref. 205). Males may be brooding at 11.25 cm SL.

分布於印度-太平洋區，包括馬達加斯加、印尼，東至新加勒多尼亞與斐濟，北至日本。臺灣發現於東部及東北部。

小型魚類，偶為潛水或網具捕獲，除學術研究及水族觀賞外，不具食用價值。

體特別的延長和纖細，無鱗，由一系列的骨環所組成；軀幹部的上側稜與尾部上側稜不相連接，下側稜則止於臀部骨環附近而不與尾部相接，中側稜則與尾部下側稜相接。吻略長，頭長為其2.2-2.6倍。主鰓蓋縱稜不明顯或缺如，軀幹部的中側稜及下側稜並不明顯。骨環 16-18(通常 17)+ 30-34；背鰭鰭條數 53-56；胸鰭鰭條數16-20；尾鰭鰭條數 9。體淡褐色，側稜上有時散在雜斑或斑帶。

主要發現於水流緩慢的淡水溪流、小河及河口。以蠕蟲、甲殼動物及浮游動物為食。卵胎生的，雄魚尾部下面具孵卵袋。雄性在標準體長 11.25 公分時可以繁殖孵卵。

Found in streams, rivers, and estuaries. Males may be brooding at 11.25 cm SL.