The Paradise Fish is a relatively peaceful fish. While not being aggressive, they are territorial, and should have two to five gallons to themselves. If cramped, they will attack other smaller fish. Like Betas, they will attack their own kind, so only one should be kept per tank. Otherwise, they will get along with other similarly sized, semi-aggressive fish.
Cichlids make good tank mates.
Paradise Fish are also great jumpers, so their tank should be covered. Moderate plant and rock decoration will be best for the Paradise Fish. Paradise Fish are very colorful. They have a green to brown colored body with shiny blue and red vertical strips that alternate down their body. Their fins have varying spots of red, green and blue.