What are some of the most common fish diseases seen in Minnesota?

Just like people, fish sometimes get sick.
Fish can carry a variety of diseases and parasites and are sometimes infected by bacteria, fungi, protozoa, viruses, or other parasites. Poor water quality, overcrowding, increased water temperatures, or stress from the act of spawning can make healthy fish more susceptible to these diseases. Chances are, you’ve probably caught fish with obvious ailments. Although there are a host of diseases out there, here’s a look at some of the most common ones in Minnesota.

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