I have kept this fish in a community tank (a 75 gallon long, I find this fish is either aggressive towards fish that are similar looking e.g. Bettas (can be crossbred with) and Dwarf Gouramis (They have the stripe pattern)and towards fish smaller than itself. Some individuals only become aggressive defenselessly.
However,I found this species does well with big fast Danios and Barbs. I have also kept them for years with Spotted and Snakeskin gouramis, with the males of the two mentioned species dominating Paradise Fish in territorial disputes.
Furthermore good sized bottom dwellers like Cory Cats seem to be ignored. I think you have overstated the aggressiveness of this species towards tank-mates. I found some individuals to be completely passive while other are much more territoriality aggressive. Most of the Paradise Fish I have kept have been mildly aggressive. I would also suggest adding photos of the blue color morph and female fish. Thank you for your time.
Tropical Fish for Freshwater Aquariums: Flame Dwarf Gourami
The Dwarf Gouramis are , in the wild they feed on small invertebrates, algae, and other . In the aquarium these fish will generally eat all kinds of live, fresh, and flake foods. To keep a good balance give them a quality flake or pellet food as the base to the diet. Supplement this with live foods such as white worms, blood worms, brine shrimp, or any other suitable substitute. Vegetable tablets can be offered as well. Generally feed once or twice a day.
Tropical Fish for Freshwater Aquariums: Neon Blue ..
The Gold Gourami is a very attractive color-morph of the (previously ). It is one of the more vibrant colored varieties. It has a pretty gold tone and a deeper toned striped patterning along the back, but it lacks the two dark spots seen on its parentage. This pretty fish makes an attractive addition to the aquarium.
If in a pair the two fish will swim together