Alright so I have this small cali round ray and lately I have noticed that he is acting weird. He doesn't bury himself in the sand as much and he is always trying to keep the majority of his body off of the sand. I took a close look and there is either some sort of white worm on his skin or it is like dead skin or something. this is only on the bottom of his disc. now he even tries to keep his tail off the ground. Could it be the sand having lots of worms in it or the ray just getting sick? HELP PLEASE