It's a golden ram. Sometimes also called golden German ram. The blue German ram looks similar, but is blue. I think it might be able to cross them, as we used to have 2 blue German females, and one looked as if it had a lot of gold in it too. But DopeyAlex's fish is definitely the golden of the variety. Lovely looking fish. Looks like a male too.
I agree sam, it looks like a parrot fish in the link, I don't think it's a Golden ram at all, but I don't know what it is so i'm not getting into a debate.
that is deffinately a european bred ram, they are the same as the normal rams but obviously they have just been bred to be golden kinda like tench and golden tench.