thanks. i have two 2.5-3 inch SA bumble bee cats, baby tsn, 5 giant danios, two 4 inch raphael cats, and the 2 small peacock eels and the rays never harass them. I had a school of tiger barbs and they were actually picking on the ray. They were biting my rays tail and got a one way ticket to the community 55 gallon. i knew tiger barbs were fin nippers but i didn't think they would/could pick on a stingray. Thanks for the warning though. Anyone know where i can get a female retic?