I bought a South American Cichlid about 6 months ago, and he was already a fairly large size when I bought him. He will not tolerate other fish in his tank and killed all the plecos, because they were smaller. About a month ago I got a larger tank, 55 gallons, and a huge pleco from a friend. I transfered him without any visible signs of stressing and he and the pleco get along fine. About a week ago I noticed a large lump/tumor thing on his forehead area that wasn't even present before. Since, he has been eating and swimming actively. Should I be concerned?
Here is a picture of the spot on his head:
http://s306.photobucket.com/albums/nn258/Henry_Duval/fishyy/?action=view¤t=NEWNEWNEW063.jpg&t=1217875438813
Any help would be much appreciated! Thanks!
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