My buddy caught some of these and came by the house and turned them loose all around the living room. Was funny as hell, so I tracked them all down and put them in my fish tank, and they fought it out to the death and ate each other til there was one left. I thought… Damn, I was hoping they would reproduce… Couple weeks later there were hundreds of crawfish babies everywhere… Again the environment was too small so they fought it out. Crazy creatures