Yep, the bulge comes with age, but the orange color is his own "special" thing. LOL
He was sent to me as a Golden Sunshine. They have a mottled appearance, white and orange on a yellow background. But this guy decided he didn't want to be a spotty yellow fish. So the only orange is on his nose and he's pale pink instead of yellow. He often gets mistaken for a silver pigeon, but the orange nose is a dead giveaway that he's not a silver.