OK...I put in a small (2.5 in) crayfish in my 10 gal tank with my 2 cory's and my 4 rasboras...so far the crayfish dug itself a little cave under one of my rocks...it only comes out when i feed it Shrimp Pellets, and then it drags as many as it can into its cave before the cory's come and scare it away and eat the rest of the food...it seems to me that the crayfish does not pose a threat to the corys as they seem to pay no attention to it, and it always reatreats from them...has anyone else had a crayfish in with some corys? I've read that in theory I shouldn't keep crayfish in with other bottom feeders...but I like the crayfish a lot...some one set me straight if I have made a big mistake....