I picked up a pair of GSMs a couple of months ago and they were both pretty small, maybe an inch and a half long. They have grown quite a bit since I have had them and I would say that they are an inch and three quarters long now. I just noticed the other day that one of them is starting to develop some gold on the cap of his head. Is this a sign of sexual maturity or is there a magic age when this happens? My clowns are happy and healthy, however they have not discovered their GBTA as of yet. I feed them at least twice a day either flake, cyclopeze flake, formula 1 pellet, another pellet food or Jack Blacks reef crack which is a combination of mysis, brine, green algaes, clams and other assorted meaty morsels. I usually soak one of their daily feedins in garlic as well.