Parasites are organisms that live off other living things. Fleas on a dog or ticks on a deer are common examples. Parasites are among the most successful animals on earth, and many have fascinating life cycles where they change form and move from one animal host to another. If you have ever fished for northern pike, bass, or panfish, chances are you have encountered a parasite known as black spot disease.

• Vermont Fish and Wildlife Department

• Michigan DNR – Black
  Spot (Black Grub)

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