Ok I have a Parron shark that has his spot in the tank that he likes to hang out and lately my Motoro ray has been insisting on going over into his spot so my parron has been going after him. I don't think he is actually biting him because he has no marks on him. The Parron just puts his mouth on the ray and almost looks like he is scooting him away. I have had them together for quite a while and I have just noticed this lately. I was just wondering if anyone else has these fish and if they have had any problems with them.