JIM27, thanks for the information. I had a LFS tell me that, but it was the same one told me that you couldnt put a bamboo shark and a ray together, when the other LFS I frequent has a "Shark Tank" that has several rays and sharks together.
Also, it seems that a lot of times when you post any question about a ray or shark, someone always has to put their two cents in about how they should should only be kept in the ocean.