The Opaline Gourami is also known as the Marbled Gourami, and is a color variation of the Blue Gourami. This gourami is a rather peaceful fish that is very comical to watch as a juvenile. The Opaline Gourami is silvery pale blue, with darker blue markings. Opaline Gouramis are considered Labyrinth Fish, meaning they breathe directly from the air and must have access to the surface of the tank.
The Opaline Gourami is compatible with a variety of tank mates that are of similar size and temperament. While males can be territorial with each other, they become timid around other, more aggressive fish. The ideal tank set-up would be a minimum of 20 gallons and have plenty of live plants as well as rocks and driftwood for use as hiding places.
The best way to differentiate between the male and female Opaline Gourami is by the dorsal fin. In the male, the dorsal fin is long and pointed, while the female's is shorter and rounded.