ok so i ended up picking up a nice little ornate poly for a real good price 25.00$ canadian for about a 5 incher. I've put him in with the rays and no problems so far, he seems to hide a lot and only really come out when its feeding time. He's afraid of the rays so it doesnt look like he should be agressive towards them. I'll keep you guys up to date on how things go with this little guy and my little rays together.