There are a number of Indiana Fish Diseases. Inside this post I
am going to share with you a few of the diseases that you could
run into. Be on the lookout for anything out of the ordinary
that could mean a sick fish. Red Sore Disease: One of the most
common disease problems encountered in freshwater game fish is
generically referred to as “red sore disease.” This problem
usually occurs in the spring and fall, and fishermen and pond
owners are often concerned by the appearance of red ulcers and
sores on their fish. Typically, “red sore disease” is caused by
two organisms, Aeromonas hydrophila , a bacterium, and
Heteropolaria sp. (formerly Epistylis sp.), a protozoan. Both of
these organisms are found in aquatic environments and are
capable of causing disease. Red sore disease will often run its
course, and fish may recover without treatment. The primary
concern is often not mortality of fish, but rejection of the
affected fish by anglers because of the diseased appearance.
Occasionally red sore disease can re