when you have bred so many cichlids so many times you begin to see the differences. one of my festae always has HER bars way darker than the rest and she is a lot smaller and the more aggressive of the 4. the males all look the same. as for my umbees, i have 2 that are quite a bit larger than the other 2. they only mess with each other though and dont pay any attention to the 2 smaller ones. the 2 smaller ones go up and school around with my swordtails and silver dollars. the 2 smaller umbees also have their mid spot dark at all times and dont show their whole vertical line where the males either have the full line or nothing at all. i will get some pics as soon as i get a camera and try to do some point outs for ya guys.