We'll the pictures are a bit fuzzy, with little resolution. Could very well be lymphocystis. The lesions look like raised bits of cauliflower and are often seen on the fins, but also on the body. Because you can see the fish up close you are in the best position to assess this. Lymphocystis is pretty unmistakable - so hopefully you've sorted out the diagnosis. It's caused by a virus and is usually brought on by stress, but not always. As Hattie noted, there is not treatment. The best course of action is to do everything to reduce stress: ensure you water quality is spot on and feed high quality, fresh food. My advice would be to go for some of the frozen brands that include a vitamin supplement, which will help boost the immune system and promote wound healing. The reason I asked how long you had the fish is that problems such as these (and other ailments) are often legacy issues from capture, shipping, holding in the LFS and then transfer to your tank - all of which can take it's toll! The good news is that Lymphocystis is fairly benign and very rarely pathogenic so your fish should pull through. Having said that, the fins still look a little ragged to me (again hard to say from the photo). So, if you do have the fish in Q, you may want to try a course of the Maracyn II to help prevent a bacterial infection from setting in. I would stay avoid the use of coppersafe, as the therapeutic margin is very narrow and it is clearly not indicated in this case.
Good luck with it.
