I had a large female Jag named big mama who was very territorial. One night I was performing a water change and I stuck my arm in the tank to move some of the decorations and all of a sudden I felt something that felt like a bee sting. I looked down and she was getting ready to strike again. It scared me at first but after I thought about it, it seemed pretty cool. Has any of you guys ever been bitten by your'e large cichlids?