Great general information about gourmai fish is their unique courtship behaviour. These fish have modified pectoral fins, which act as antennae. When the male mates, he creates a layer of bubbles on the water surface, where he picks up and keeps fertilized eggs. These eggs can survive for three days without the male eating them. Fry hatch within a day or two, and feed on the yolk sac, before eating the food you provide.
Although they can be found in the wild, most gourmai fish are not native to the United States. They are native to Asia and are members of different genera. The most common gourmai species, the dwarf gourami, is about six centimetres long and is considered a beginner fish. It is among the smallest gourmai species and is often kept in a mini fish tank.
Source: https://fishingrod-en.com/gourmai-fish/