There is a couple of different color variations of this species, but they are usually the same in temperament.
They can be quite aggressive toward other Gourami & smaller species.
Be wary of this when buying them, they do fit in well with larger Tetras like Congo's etc
I have seen them in tanks with Rasboras and had no issues.
pH - 7.0
GH - 100 - 200ppm
Temp - 24 - 28c
They get their name from the 2 black dots they have on their flanks, as well as the eye.. 3 spots.