Originally Posted by lochaber
I did have one tank that had some sort of apple snail, a convict cichlid, and a wild crayfish, and after a couple days of confrontations, seemed to settle into a sorta tense state of mutual tolerance. Not a set up I'd try again though...
I once kept a six inch large mouth bass as a pet. I caught a huge (5") crayfish and put him in the tank to clean up. The bass grabbed the crayfish by the head. The crayfish clamped on to both sides of the bass' jaw with his pincers. They swam around together like that for about 3 days before they reached that "tense state of mutual tolerance".