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Bowfin (Dogfish) A medium-sized, greenish fish, the bowfin can be found in clear lakes and slow streams through much of Minnesota. Bowfin survive in murky, oxygen-depleted water by rising to the surface and gulping air into their air bladders. They can also survive out of water for a considerable time.
Anatomy of the Perch. The Yellow Perch (Perca flavens) is a common fresh-water fish found throughout North America. It is a generalized fish, without a great degree of specialization, and therefore makes a good representative for fish anatomy.