Sicko Goldfish! Please Help! :(

Aug 14, 2007
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#1
I have a gold fish for about 9 months, and about a couple of days ago i started to see that he wasnt very active, and his fins were clamped. just yesterday i saw that he was doing better and swimming around more and he looked happy, but today i just recognized that he has this red lump right behind his gill. its petruding out and its red. what do u think it might be? and what might i do to help him out? he is my most favoritist fish and i dont want to lose him! PLEASE HELP ME!!!