weird growth on red-tailed rasboras?

etspam

AC Members
Feb 11, 2007
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I have a 20 gallon tank with 6 red-tailed rasboras, 6 gold white cloud mountain minnows, and 3 panda corys. While feeding tonight, I noticed that one red-tailed rasbora has a weird growth behind/below his left gill area. It's reddish, and kind of big, looks like a cyst, and protrudges out laterally and down. He's gulping almost continuously, unlike the other fish which do it every now and then. Wasn't moving too much originally either, though is a bit more active now that I've taken him out of the tank and stuck him in a bowl. Don't have a quarantine tank or anything, but I don't want him infecting the other fish if it's a disease. Is this something that can be done for him, or is he a goner? Is it a tumor? The ammonia/nitrates are normal, and temps around 75.
 
Can you post a picture?
 
Mine has that too!

I have red-tailed rasboras too! (although they were sold to me as Brilliant rasboras) One of mine has the same big, nasty bump. It was originally very red, but has faded. This bump has been there for about a month, and the fishy is still swimming fine and eating great. The other four rasboras have not been affected. Good luck!!!
 
Too late, found him belly up this morning :-(. I was guessing this would be the case, he wasn't really eating or moving much. The growth was about 1/5-1/4 his overall body size too. Next time I'll try to get a picture.
 
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