Common name: Bluegill, sun perch, yellow belly Native. ID: Two dorsal fins, small mouth, pointy pectorals, black spot on rays of dorsal fin which makes it different from other sunfish. Life cycle: Males create a nest in a depression where females then lay the eggs. Males fertilize and guard the young. Sexually mature at around 3 years old and live to be an average of 6 years. Feed on: When young, algae and zooplankton. As adults, small fish, insects and plant matter. Feed on top, in midwaters, and often work as bottom feeders. Competitors: Other bottom feeding fish. Where to find them: Warm waters; the lower Great lakes. Prefer cover such as weeds, logs and drop-offs. Shallow water unless hot temperatures, then go to deeper waters.