I have two leopard wrasses 4 inch and 3 inch roughly. They both have the speckled female color pattern and look roughly the same except for size. They are active, eat well, and get along great. Usually they are within a foot of each other at any given time so they seem to prefer to swim and hunt together. The were added to the tank a few weeks apart and purchased at different stores. They have been in my tank for about 4 months now and I have heard that they will develope a hierarchy with the larger one becoming male and changing color. When can I expect this to happen. And will any complications arise when it does?