Hi Jerri

The lump looks solid, not fuzzy It is white, the same colour as the scales
of the fish around it, which is round about its belly area. or it could
actully be the colour of fish flesh. The size is probably less than 1/4
inch. The fish is eating well and looking otherwise healthy.

It sounds like carp pox....which sounds terrible, but is nothing to worry about
.. Do nothing to the fish....it will go away on its own after a while. Every
one I have known who had a fish with this had the fish recover with no
treatment....It will not spread to the other fish....just ignore it Jerri

http://www.fringeweb.com/Ponds/JerrisPond