Mangrove Goby

Characterized by pale greyish to light brown body color with brown mottling on back; midside with horizontal row of five brown blotches or clusters of smaller spots; caudal fin with scattered iridescent green flecks and submarginal dark band; first dorsal fin spines elongate and filamentous in male; rounded caudal fin, equal or slightly longer than head; longitudinal scale series 32; predorsal scales behind eyes; fully scaled opercle; upper half of cheek scaled; depth of body 3.5-3.8 in SL (Ref. 90102).

Procerovum Infestation 1. Parasitic infestations (protozoa, worms, etc.)

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): 6 - 7; Dorsal soft rays (total): 10; Analspines: 1; Analsoft rays: 8

Inhabits mud bottoms of estuaries, marine lakes and occasionally in the vicinity of reefs (Ref. 90102). Common in marine lakes (Ref. 37816).

分布於印度-西太平洋區海域，由印尼至菲律賓，北至日本，南至澳洲。臺灣分布於東北部海域。

小型魚類，不具漁業價值。

第1背鰭：Ⅵ；第2背鰭：Ⅰ/ 11~12；臀鰭：Ⅰ/ 9~10；胸鰭：18~20。縱列鱗 29~31。體延長，前部成亞圓筒形，後部較側扁，尾柄略長。頭中大，側扁。吻略短而圓鈍。眼間隔較窄小。口裂大，斜裂，口裂可達眼中部的下方。唇肥厚。鰓裂略小，延伸未達前鰓後緣。體被中大型的櫛鱗，頭背側及胸部、腹部被鱗。第一背鰭以第3棘較長。臀鰭的起點位於第二背鰭第2軟條的下方。尾鰭呈長圓形。頭、體為灰棕色，腹部淺色，頰部灰色。頭、體側上部具有許多不規則的黑斑，體側中部的黑斑較大，形成一縱列。體下部在胸鰭後端處具1個黑斑。眼後緣至胸鰭基、口角至胸鰭基各具1行灰黑色的縱紋。鱗片後緣具許多亮綠色斑點。第一背鰭具2~4個黑斑和不完全縱紋；第二背鰭具2~3縱行黑斑，鰭膜灰黑色。臀鰭灰黑色，基部色淺。胸鰭淺色，基部具2縱行小的灰黑色線紋。腹鰭黑色，具淺色邊緣。尾鰭灰色，上半部具由小黑斑組成的不規則橫紋，近後緣具1條弧形黑紋，黑紋後側為淺色邊緣。紫鰭細棘鰕虎(/Acentrogobius janthinopterus/)為同種異名。(林上智、林沛立編寫 2012/10)

近岸底層小型魚類，棲息於汽水水域或近岸淺水處。喜生活於灘頭的泥洞中。主要以小型魚類、甲殼類等動物為食。