So I am in the process of getting a custom tank built (9ftx3ftx2ft, total gallonage w/ sump close to 500) and was wanting to get a ray or a shark with some small mixed reef stuff around. I think it's enough space for one of them but I am wondering if i could get away with having one of each (one small species ray like cortez/bluering and small species shark like a catshark or epaulette) and if they would get along.