KJ, the stuff on the clown is likely a form of a clownfish-specific disease called brooknella. It's a parasite which means its treatment options are similar to ich, however it's often not a very virulent parasite. In many cases, feeding heavy with vitamins and garlic can/will save the fish. ORA clowns are great and often disease free, but there's one problem with tank-bred clowns. Their immune systems often times have never had to fight off infection in the first place. So if you do have a dormant parasite in your tank, they can become affected. Hopefully the little gal can fight it off. Good luck