Is there any goldfish that has a wen but it only grows on its head.

There are a lot of goldfish that only get wen on the head. Actually, there arent any that get it any other place. Oranda, ranchu and lionhead all get wens.

And crown pearlscales.

Do ypu mean that it will not grow around its eyes.

Do you mean that it will not grow around its eyes.

Ooh... well thats something that depends on the fish and its genes. I havent seen the wen around the eyes on the crown pearlscales but it can happen on any of the others.

That's what a wen is, a headgrowth.

If you mean only on top of head, not around eyes, then yes. Lots of fish get that. It depends on the fish, and crowned pearscales

Yeah it depends on genes and all that, but if it does get over the eyes it's not too bad as they can still sniff out food.