small white patch on fin?

[Voyager1000]

I've loaded a couple photos in the gallery for review, any suggestions on what this is? It's been there for more than a month, but seems to be getting more pronounced.

Thanks

 

[Percula9]

It looks like Lymphocystis. It's a viral disease not much you can do. Good nutrition should clear it up. In some cases the lesions can be scraped off. It should go away.