dude, i think your fish is broken. i think that fish had some serious dietary defficiencies somewhere previously in his life. i think a vitamin C deficiency causes those deformities in fish to develop. i've seen a few cases that like and they all on tangs, a lot of hippo tangs. there's nothing you can really do at this point except make sure that he's eating properly to aviod any further problems. also it looks like he was beat up at the same time and was so damaged that he's not able to regrow his fins.