i agree with fishdog... its a male too you should look up both rays and see which one u think it looks more like as you can see the pattern better then we can in ur pics.
id remove those rocks just because rays scratch easy...and it would give the ray more room to move around in the tank
Looks a little like a castexi to me, and i agree on the rocks they look a bit sharp. Also how often do you clean the tank? looks like theres some debri on the rocks maybe worth giving it a gravelvac?