When I got my tank, he had 1 larger clown in one tank and 1 smaller clown in another. Both had been separate for many months, so it's logical to say that they are both female. When I inherited the tank, I put them both in together. The larger one (who had been separate for about a year) is the one that is submissive. Kind of weird but they're fine together.
30g Long Frag Tank
3g Pico Reef