How does a Betta fish smile?

Male bettas will fight other males for no reason. you should never put 2 males together.

Yes, Bettas much prefer temperatures above 75 degrees.

Betta Fish CAN coexist with other fish. However, you'll need to pick your new fish carefully. Anything colorful with flashy fins will cause a problem. Typically you should add fish that are larger...

bigger fish. well, not so big that the beta can get eaten.beta fish are better kept by their self.

Yes. It is only male Bettas that will fight and then they will only fight other male Bettas.