Madura Goby

Five brown roundish blotches along the lateral midline; predorsal scales 19-27 (mean = 23.4).

Apocryptodon madurensis is known from eastern India, Thailand, Singapore, Indonesia, northern Australia, and the Philippines.

Distinguished by the following characteristics: five, brown, roundish blotches along thelateral midline; predorsal scales 19-27 (Ref. 5218).

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).

Found in fresh and brackish waters (Ref. 4833). Browses on diatoms; not active at low tide, staying in burrows made by Alpheus bisincisus and others.

Found in fresh and brackish waters (Ref. 4833). Browses on diatoms; not active at low tide, staying in burrows made by Alpheus bisincisus and others.

fisheries: of no interest

分布於印度-西太平洋區海域，由印度東岸至菲律賓，北至日本，南至澳洲。臺灣分布於西南部海域。

小型魚類，不具漁業價值。

第1背鰭：Ⅵ；第2背鰭：Ⅰ/ 22；臀鰭：Ⅰ/ 22；胸鰭：22。縱列鱗 50~54；橫列鱗12~13；背鰭前鱗22~23。體延長，前部呈亞圓形，後部側扁。背、腹緣線皆頗為平直，尾柄短而高。吻背側頗為圓鈍。眼小，上側位，眼間隔狹小。口裂大。近乎水平狀，口裂延伸至前鰓蓋的後部；上頜前方齒直立，鈍尖，犬齒狀，每側14-17顆；下頜齒平臥，齒尖分叉，每側24-26顆。唇薄。鰓裂中大。體被有中小型的圓鱗，頭部、背前區亦被鱗，頦部、喉部、頰部及胸鰭基部均具鱗。第一背鰭以第2、3鰭棘較長；第二背鰭低而基底較長；尾鰭為尖矛形。體呈淡灰色；背側有5-6個不規則的褐色斑塊，體側中央約有5個暗色橢圓型的縱斑。頭及身體無其它明顯的黑色斑點。各鰭暗灰而透明；第一背鰭3-5硬棘上部通常具一黑斑；臀鰭下部黑褐色；胸鰭大部分深色，邊緣淡色。(林沛立編寫 2012/10)

暖水性沿岸小型魚類，生活於河口汽水水域、沙岸、紅樹林及沿海沙泥地的環境。雜食性，以底藻、小型無脊椎動物、有機碎屑等為食。