If your ray is healthy and eating like a healthy ray, any fish that's similar to it's size is in danger even if it's a bit bigger. If it won't fit into your ray's mouth, they just grab hold and tear at it until it does fit. if it still doesn't fit, then you'll just end up with a shredded up aro. It's not a definite thing, but theres a high chance of it happening. I would keep a divider up for the next month or two until your aro hits 7-8", then there would be no problems for sure.titustitus;4969777; said:Good to hear that! Oh gosh! actually i do have that little thing with the motoro but the motoro is a pup too, aro is 5' and motoro is 5' disc length! will it be ok?