The redbreast sunfish (Lepomis auritus) is a species of freshwater fish in the sunfish family (family Centrarchidae) of order Perciformes. The type species of its genus, it is native to the river systems of eastern Canada and the United States. The redbreast sunfish reaches a maximum recorded length of about . The species prefers vegetated and rocky pools and lake margins for its habitat. Its diet can include insects, snails, and other small invertebrates. A panfish popular with anglers, the redbreast sunfish is also kept as an aquarium fish by hobbyists. Redbreast sunfish are usually caught with live bait such as nightcrawlers, crickets, grasshoppers, waxworms, or mealworms. They can also be caught using small lures or flies. Most anglers use light spinning tackle to catch redbreast sunfish. It is popular with fly anglers in the winter because it will more readily strike a moving fly than will bluegills in cooler water. As is typical for the sunfishes, the female redbreast sunfish lays her eggs (about 1000) in a substrate depression built by the male. The male guards the eggs and fry. The specific epithet, auritus, is Latin for big-eared. Description The average length of the redbreast sunfish is around with a record . The record weight for the fish is . The redbreast sunfish is characterized by a long black opercular flap, which is longer than those of most other sunfish in its range. There are a few blue iridescent vermiculations on the head. Small teeth may be appreciated, mostly on the roof of the mouth. There are faint vertical bars present on the olive-green bodies of both sexes, which may become more apparent as the background coloration changes to blue-green near the lateral line. Males have darker ventral coloration than that of females, ranging from orange-yellow to orange-red. The caudal fin has a shallow fork and may have orange to red pigmentation. It is common within the redbreast sunfish's native and introduced range for hybridization with other sunfish species to occur. Distribution The species' native range is in the eastern United States and Canada, in rivers emptying into the Atlantic Ocean. The redbreast sunfish tends to be more of a cool-river species, but also inhabits freshwater lakes and streams. The species has been introduced as far west as Louisiana and West Texas. Lepomis auritus has been transplanted to and become established in Germany, Italy, Mexico, and Puerto Rico. The