Paradoxodacna piratica is a species of fish in the family Ambassidae, the Asiatic glassfishes. It was described in 1989 and placed in a new monotypic genus of its own, Paradoxodacna. It is native to Indonesia, where it occurs in Sumatra and southern and western Borneo. This species grows to a length of 9 centimetres (3.5 in) SL. It has specialized teeth and retrognathous jaws: the upper jaw is longer than the lower. It eats the scales of other fish. This habit inspired its species name, piratica. This fish lives in tropical streams and rivers.