tanks to small for a ray, if you left the entire tank bare then you could get away with it for alittle while, and I wouldn't start out wtih a spotted ray, which I'm guessing you mean a blue spotted ribbon tale ray which are very hard to keep alive, if you want a ray get a yellow or california ray they are the most hardy and you can find them relatively small, but personally get a larger tank if you want a ray. best of luck with your choice, make sure you have quality filtration too,