The paradise fish is one of the more aggressive members of its family. It is more aggressive than the three spot gourami, yet less pugnacious in nature than the less commonly kept combtail.

Can paradise fish live with bettas?

Paradise gourami are quite territorial. They'll kill your female betta the same way a male betta would. Also, paradise gourami are sub-tropical fish. They should be kept without a heater, unlike bettas.

Are paradise bettas aggressive?

Paradise bettas are highly territorial, and like all bettas, can be very aggressive. You must not under any circumstances keep two male bettas of any variety together. They will definitely fight, potentially to the death.