I purchased two Clarkii clownfish about two weeks ago they are nice to each other most of the time and even sleep together. One has started chasing the other and it is submitting by swimming on its side and shaking as normal. The problem is that the bigger one is the one sumbitting and the smaller one is more dominant why is this? If this is ok how long will it take them to pair and how long will it take them to breed after that?