Hello hello, we got a red mandarin the other day and he's chasing our smaller clownfish around. It was pretty funny to watch until I found one clownfish in an over flow and another dead in the filter sock. I had 4 clowns, an adult and 3 small ones. The small ones are about the size of the mandarin. The clowns like to hang out near one of the returns. I don't think I've ever seen a mandarin care about any other species of fish other than their own.