What The Heck?

[boosted16v]

First post, sorry....I noticed yesterday that one of my Cherry Barbs has developed a large swollen tail. I dont know if its dropsy or what? Very strange, dont believe its eggs, because its too far back, around the spot on their tail. It also seems to be gasping more than the other fish, and staying secluded.  Anybody seen something like this? sorry for the bad pics, I think it knows Im trying to take it.

 

[techen]

Tank size and tank mates please. Sounds like its been bitten?

 

[boosted16v]

Sorry...Tank is 75 gallon planted. Only tank mates now are a few cory's about 12 tetra's, more rosy barbs ( I wrote cherry for some reason) and a few tiger barbs..its very strange, perfectly round, wish I could get a better picture, and its tail almost looks longer because of it.

 

[majerah1]

Yes very hard to see, but it could be due to the tiger barbs. They are pretty aggressive little things.