I got two CPO recently for my shrimp tank and right away one killed the other...lots of hiding places 20 G I thought that was more than enough room.
But now I have noticed the remaining crayfish attacks anything that comes by it. Tonight I found my big bristlenose streaming blood. I removed the bristlenose so he can rest I hope. (hope he makes it ) As far as I read these crayfish are supposed to be fairly peaceful...I thought...??
There is lots of food so I don't understand why it would be such a bully to the bristlenoses.