http://www.digiaquascr.com/Blog/SunfishSpecies.htm
Green Sunfish
Description:
The green sunfish is a species of freshwater fish in the sunfish family. The green sunfish is blue-green in color on its back and sides with yellow-flecked bony-ridge scales called ctenoid scales, as well as yellow coloration on the ventral sides. All of the fins, except the pectoral fins, have an orange, yellow, or white outline. Green sunfish have a moderately compressed body, but are not as deep bodied as bluegill and other sunfish species. They have a very large mouth and the upper jaw extends back to the middle of the eye, 41 to 53 lateral line scales, larger species are very similar to a bass. The dorsal fin usually has 10 (rarely nine or 11) spines and 10 to 12 rays. They are found in ponds, lakes, rivers and streams around the rocks, weeds, brush and timber. They can handle very harsh water conditions such as murky water and low oxygen levels.
Green sunfish are found in warm, slow-moving backwaters and quiet pools of sluggish streams, lakes and ponds. They are very tolerant to poor water quality and are often the only sunfish found in very muddy waters. Green sunfish have a high tolerance for ecological conditions, but tends to become most abundant in rocky situations, of either lakes or streams, where other sunfish are absent or uncommon.
What to feed green sunfish?
Because of their large mouths, Green sunfish can eat anything they can catch and swallow such as Aquatic insects, small crustaceans, minnows and worms, and small amounts of plant material. Aquatic and terrestrial insects and invertebrates are the most common food items. Small crayfish, fish and frogs are all in danger when green sunfish are present.
Other Names:
Green Perch, Black Perch, Pond Perch, Creek Perch, Sand Bass, Blue-spotted Sunfish.
