The green sunfish (Lepomis cyanellus) is a species of freshwater fish in the sunfish family ( Centrarchidae) of order Perciformes. A panfish popular with anglers, the green sunfish is also kept as an aquarium fish by hobbyists. The green sunfish is native to a wide area of North America east of the Rocky Mountains, from the Hudson Bay basin in Canada, to the Gulf Coast in the United States, and northern Mexico. They are specifically indigenous to a number of lakes and rivers such as the Great Lakes and some of the basins of the Mississippi River. Green sunfish have been introduced to many bodies of water all across the United States, so are frequently encountered. The green sunfish is blue-green in color on its back and sides with yellow-flecked bony-ridged (ctenoid) scales, as well as yellow coloration on the ventral sides. They also have a dark spot located near the back end of the dorsal fin, the bases of the anal fins and on the ear plate. It has a relatively big mouth and long snout that extends to beneath the middle of the eye. The typical length ranges from about 3-7 in and usually weighs less than a pound. The green sunfish reaches a maximum recorded length of about 30 cm (12 in), with a maximum recorded weight of 960 g (2.2 lb). The species prefers vegetated areas in sluggish backwaters, lakes, and ponds with gravel, sand, or bedrock bottoms. They also can be found in very muddy waters and are able to tolerate poor water conditions. Green sunfish tend to spend their time hiding around rocks, submerged logs, and other objects that provide cover and protection.