Moonlight Gouramis are gorgeous! As you can tell, they have an iridescent sheen to them that makes them stick out in any aquarium. They will grow to be about 5 inches long and as they grow, they will get a greenish blue tint to them. Moonlight Gouramis are omnivores, so they should have a well balanced diet of both meaty and vegetable based foods. Great tank mates for them are peaceful fish that are about the same size. Too small, you risk your gourami beating them up and too large you risk your gouramis getting beat up.