Here is a possibility, since your fish may have hidden in an area it
normally wouldn't have,
and come into contact with high concentations of nitrogen (poorly filtered
area)
==================
GAS BUBBLE DISEASE
SYMPTOM: bubbles under the skin anywhere, but usually in the fins.
Gas bubble disease happens when the water is full of supersaturated gases.
The fish swim into the area where the water is saturated (usually with
nitrogen) and takes the gas up across the gills.
It is most often seen when water from deep wells is run directly into ponds
or tanks. In the deep well, the water is colder (more gas is dissolved) and
under pressure (more gas is dissolved). In tanks, the fine bubbles are seen
on the tank walls and everything else and is obvious.
In ponds, a small leak in big pumps that suck air into the stream of water
an also create supersaturated conditions, as can swimming pool type sand
filters.
Inside, aging water with an airstone degasses well water. For ponds,
spraying the water into the air or using degassing columns (running the
water over lava rock in a PVC pipe).
==================
Rex}{{{{o

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. hope you can
help, and thanks for your reply,

Barbara




"Jerrispond" wrote in message
...
Where is the lump located on the fish? Is it pure white, or a fleshy
color....does it look waxy or fuzzy.....sorry, I don't know how large 2
millimeters is....Jerri


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