Common Kole Tang Ailments?

[FishTri]

Can anybody help diagnose and recommend treatment?

The first picture shows a vertical, football-shaped raised area just past halfway back on the tang's body. The area is slightly lighter in color that the rest of the body.

The second and third pictures show the same raised area, along with some white spots/patches on the tail fin; mostly on the perimeter. I don't think its ick, because the spots are kind of fuzzy. (I think of ick spots as being sharply defined, if that makes sense.)

I got this fish from a fellow reefer. At the time it appeared healthy. It has been in quarantine for about a month. Unfortunately, I had it in a large plastic bucket and could not view from the sides, so this has developed until today when I took it out to examine it.

I'd like to start a course of treatment, but don't really know where to begin...

Thanks for your help.

 

[marc price]

hard to say, less than ideal h20 conditions of a holding tank could very well be the cause.

?'s:

did the bucket contain at least 20gallons of water?

did the biological filter keep the water parameters in the safe zone.

did you run a level of copper for 14 days?

did you perform @10-20% h20 change every third day or so?

were it's nutritional needs met sparingly without overfeeding?



i wouldn't rule out ick as larger patches do occur in later stages and the spots on your tang look smallish to be lymphocystis.



i've treated and cured fish with advanced cases of ich which had the same type of spot i'm seeing on your tang. required 28days of copper sulfate therapy in conjunction with formalin baths. the larger spots required the formalin baths and took the most time to disappear.


exposure to high ammonia and nitrite toxicity could also cause the raised area.

if the tang's small scales of the raised area are themselves raised like a rasp file that could indicate vibrio (watch for redness).