A great number of species within these four families are prized sport fishes. Examples are walleye and perch in the family Percidae, as well as both large- and smallmouth bass in the family Centrarchidae. A few, such as the banded pygmy sunfish (Elassoma zonatum) are considered indicator species, and provide scientists with information about the environmental health of a particular waterway. Several members of these families, particularly the yellow perch and walleye (in the family Percidae), are commercial food fishes.
1. Logperch (Percina caprodes); 2. Breeding male rainbow darter (Etheostoma caeruleum); 3. Ruffe (Gymnocephalus cernuus); 4. Blue-spotted sunfish (Enneacanthus gloriosus); 5. Rock bass (Ambloplites rupestris); 6. Female black crappie (Pomoxis nigromaculatus). (Illustration by Emily Damstra)
1. Banded pygmy sunfish (Elassoma zonatum); 2. Male yellow perch (Perca flavescens); 3. Walleye (Stizostedion vitreum); 4. Largemouth bass (Micropterus salmoides); 5. Male longear sunfish (Lepomis megalotis); 6. Bluegill (Lepomis macrochirus); 7. Striped sea bass (Morone saxatilis). (Illustration by Emily Damstra)
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