Originally Posted by BuckeyeRed27
I used to have these several years ago and to answer your question yes they will fight other fish. They often will do it at night and they don't lose. Not the best fish to get.
I found the opposite to be true. I have had them in community tanks without any aggression from the beta, but the problem was with the other fish that were aggressive and fast. The beta has long flowing fins and and is not a very fast swimmer. They are easy targets for faster fin biters.
Also, in a large tank with a strong pump intake, they tend to get stuck in the siphon grill.