Currently, I only have one betta. When I got him, he was a cute young butterfly cellophane guy. He was adorable as he was, but I knew he was going to marble. In less than a year, he has changed so significantly that, if you didn't know any better, you probably wouldn't even realize he was the same fish!
Here he is very shortly after I got him.
About a month ago, I went to feed him and discovered that he had grown a mustache over night! As you can see, his body has completely colored. His fins are almost completely colored also. (Please disregard the water spots on the outside of the tank! :/ )