This is my other fantail goldfish, Tiger. I bought him about three months ago on a whim. I estimate his age to be 4-6 months. First I kept him in a 10 gallon all to himself, but given goldfish and their need for room, I knew I would eventually have to upgrade. So I did. When I got my 29 gallon I moved him in with Pom Jr. and so far, the two are very happy together. He has already grown about .25" since I got him!