View Full Version : What is this attached to butterfly fin

08/31/2017, 08:27 PM
The fish got a formalin dip two weeks ago and then gone through 6 tank transfers and moved into an observation tank 4 days ago with first round of prazipro.
Last week I noticed a small black dot on its lower fin which has gotten much larger now and I'm not sure what it is. It's going through the fin and visible on both sides. I tried picking at it with a set of tweezers and was unable to get it off. It looks like something dangling off it like poop would be but it's not coming off. Doesn't look like something alive but then again I'm not sure and can't tell. Anyone have any ideas what it could be or what to do?
PS. Don't mind all the debris on the bottom of the tank, just transferred the live rock from my main tank to the hospital tank which made a mess which was siphoned out.

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