Hi folks, long time reader but first time poster. I very recently introduced an Auriga Butterfly to my tank, and I've noticed some sort of growth on his mouth. The fish was quarantined, and I didn't notice any problems. At first I thought he was just carrying something around, but as I write this post, it's still there. Notice the discoloration around the mouth?
The specifics of my tank:
75 Gallon 4-footer
Tank has been set up for approx. 2 months
Cycled for approximately 2-3 weeks, using live rock
Current Stock: 2 Ocellaris Clowns, 2 Yellow-tail Damsels, and the Butterfly in question
Water temp: 75.6
Filter is an Eschopps 125 Gal. wet-dry
Tank gets no direct sunlight
Water changes are once weekly, 10pct
Fish are fed Omega Flakes, Butterfly will get mysis shrimp as well
Lighting is notthing crazy, Coralife dual 120W Flourescents
Ph is between 8.0 and 8.5, Ammonia 0, Nitrite 0, Nitrates less than 20 ppm, KH 240ppm, GH 180 ppm, Salinity 1.245
Test Kit is API Strips
Last purchase before the Butterfly was about 5 weeks ago.
Have you guys seen anything like this before? I'm not sure how to proceed from here. Perhaps he picked at the wrong piece of live rock, but I'd much rather be safe than sorry. I'm very meticulous by nature, and I've kept him under pretty diligent observation since introducing him to the tank yesterday. No idea what could have caused this, or what it is in the first place. Thanks in advance!