I don't know how many of you have had the fortune of getting really bit by a betta fish. Well I have. Before I knew too much about them I used to go in my roomate's room and pet his fish that were in vases. Well after some time with this one of them got tired of me noodling around, turned around and bit me really, really hard. I mean not hard enough to break skin but nearly so. I'm mot small, yet he tried really hard to yank me into the bowl with him.
They bite so hard they will send you through the roof. It's amazing that such a small creature that can fit on the size of a dime can have a bite that hard. And the big ones you see in tanks in the stores, well, after this experience I know one of those big ones can bite somebody's ass off.
My current fish don't do a 180 and bite me anymore. Although one of them gave me a little nip one day that was certainly enough to get my attention. The possibility always exists though.