Asia and Oceania: Japan south to Indonesia and Papua New Guinea. Recorded from New Caledonia and Micronesia.

Trunk rhombic, mid body below the 1st dorsal base high. Nape moderately concave, snout tip rounded. Maxillary reaching rear border of eye. A distinct black spot just in front of anal base about equal to eye diameter in width.

Adults inhabit mangrove estuaries, tidal creeks and lower reaches of freshwater streams (Ref. 44894). Usually found in brackish water or freshwater of river mouths.