Oxyeleotris marmorata

The marble goby is a widely distributed species of fish in the family Butidae native to fresh and brackish waters of the Mekong and Chao Praya basins, as well as rivers and other water bodies in Cambodia, Thailand, Malaysia, Singapore, Indochina, the Philippines, and Indonesia.

It is among the largest gobioid fish, reaching a length of 65 cm (26 in), though most do not exceed 30 cm (12 in).