I've got a Mandarin Dragonette in my 90gal mixed reef. It has been doing well eating and has not been acting irregularly. I just noticed a white hole in it's side just behind it's left fin. The hole is about the diameter of a juice box straw and is about 1+mm deep as far as I can tell. Is this some sort of bacterial body rot??? I couldn't find a similar picture in my brief search, I'm posting rather than searching so that I can more quickly identify and treat the problem. I've removed the fish and have it quarantined. Here are the best pics I could take:
Picture 1 of the hole Picture 2 of the hole
I found medications that sounded like they may treat a similar symptom and they were called Pimafix and Melafix, but I really don't know. Any suggestions would be appreciated.
Thanks,
Justin