I do not know what happened. All I know is I left for work it was fine, then got home and it was on its side lifeless but breathing. Thought the stingray stung it, but the stinger looked flawless. Only other thought is it hit the glass and broke its back. This guy would follow me, the wife, or kids all over the tank waiting to be fed. He was a pig! Then within 10 hours something happened to him.......
Thanks for all the kinds words.