Oh, gotcha! Right, like @JRS said just a different variation. I've seen the same thing in our regular old goldfish - same hatching will get us long fins, short fins, and everything in between! Personally I love the long finned looks. So pretty when they swim!
Sorry folks. I don't think I've been clear enough. If you look at the photo you can see his right fin. If you are able to enlarge it you will see the ...how can i put this....the 'arm' the fin would flow from/front of the fin is huge, bulbous looking. It's the same on the left also. This photo may show better
I honestly can't really clearly see your photo. But my best guess is that you have a male with breeding stars. They can be found on gill covers, pectoral fins (leading ray) and sometimes even on the body.