Three spot gourami are known to change color (their black spots will fade) when under high stress or when they are not kept under good conditions. Healthy fish have two vivid black spots on each side of their bodies, but these fade with age. Selectively bred varieties most commonly available in the aquarium trade are opaline (or opal) (with a marbled pattern), platinum (or silver) (whitish), blue, golden (or gold) (xanthochromistic), and lavender (or amethyst) (the result of crossing a blue and golden, having a purple coloration). Three spot gourami The three spot gourami ("Trichopodus trichopterus"), also known as the opaline gourami, blue
Croaking gourami close to the water surface. At night, they might be found "sleeping" at the bottom, even resting on the substrate (which is not normally a cause for concern), or hovering motionless at the water surface. Like all gouramis, the croaking gourami can breathe atmospheric oxygen from above the water surface using a specialized labyrinth organ (like the Betta) if necessary. It is important, therefore, that the surface of the water be exposed to fresh air, usually accomplished by keeping them in an open-top tank or using a hood that allows air ventilation. If you are using good air pumps, this