I have 4 cory cats, an L87 gibby pleco, and 3 upside down cats in a 50 gallon with a half dozen young crays.......they are undisturbed. Now my female betta Opal, well her fins are looking a wee bit ragged due to those dang crusty thangs a' nippin'!
my cray is ok with my fish, if u have a large enugh tank and large enugh fish i wouldnt worrie about it. I have 8 tetras in my tank aswell, there way to fast for him to catch and my chichlids try to steal his worms.... hahaha