- Joined
- Dec 20, 2016
- Messages
- 225
- Reaction score
- 44
My sailfin tang and tenneti tang both have these markings on their faces and seem to slowly get worse. They eat plenty and I feed lots of nori no other tangs have any markings or anything and both fish have been in the tank for 3 or so years. It's hard to get pictures with the top down but I did get a little video. Not sure if it's a pest or what any help would be appreciated