Pseudambassis convexus De Vis, 1884 Pseudoambassis ramsayi Macleay, 1881 Ambassis marianus, commonly known as the estuary perchlet, Ramsay's glassfish, estuary glassfish or glass perchlet, is a species of fish in the family Ambassidae.

German-British naturalist Albert Günther described Ambassis marianus in 1880 from a specimen collected from the Mary River near the village of Tiaro, some twenty miles upstream from Maryborough, on an expedition in May 1874.

[2] William John Macleay described a specimen from Port Jackson (Sydney) as Pseudoambassis ramsayi.

[5] This species and the co-occurring Port Jackson glassfish (A. jacksoniensis) are the only two members of the genus found in temperate waters.

[5] It is native to coastal eastern Australia, from Maryborough in central Queensland through to Narooma in southern New South Wales.