| | Re: My "betta bowl"
Most of the bettas I've had don't show aggression as long as they don't see another betta, or anything that looks too close. Usually you have to worry more about other fish nipping at the betta's fins. This one is the biggest fish in the 55, and he never bothers anybody. I've even seen him wrestle over food with a baby shrimp he could have probably swallowed and both parties walked (swam?) away.
Out of all of them I've kept, only one had a nasty attitude. He killed all the other fish he was with except one otto. Even with that one, he had an apple snail and a group of ghost shrimp that he lived with for years. Go figure.