I have had one regular Ocellaris clownfish, and I recently got a mocha Vinci Ocellaris clownfish to pair with him. Both are males and I see the Ocellaris shaking near the other one to indicate sexing, but whenever he does, the mocha Vinci just runs away, he has only shaken a few times that I have seen. I am wondering if anyone else has gone through this with clownfish.