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Perch is a common name for fish of the genus ''Perca'', freshwater gamefish belonging to the family Percidae. The perch, of which there are three species in different geographical areas, lend their name to a large order of vertebrates: the Perciformes, from the Greek ''perke'', simply meaning ''perch'', and the Latin ''forma'' meaning ''shape''. Many species of freshwater gamefish more or less resemble perch, but belong to different genera. In fact, the exclusively saltwater dwelling red drum is often referred to as a red perch, though by definition perch are freshwater fish. Though many fish are referred to as perch as a common name, to be considered a true perch, the fish must be of the family Percidae. The type species for this genus is the European perch, ''Perca fluviatilis''. ==Species== Most authorities recognize three species within the perch genus: * The European perch (''Perca fluviatilis'') is found in Europe and Asia. This species is typically greenish in color with dark vertical bars on its sides with a red or orange coloring in the tips of its fins. The European perch has been successfully introduced in New Zealand and Australia, where it is known as the redfin perch or English perch. In Australia, larger specimens have been bred, but the species rarely grows larger than about six pounds. * The Balkhash perch (''Perca schrenkii'') is found in Kazakhstan, (in Lake Balkhash and Lake Alakol), Uzbekistan, and China. It is very similar to the European perch, and grows to a comparable size. * The yellow perch (''Perca flavescens''), smaller and paler than the European perch, is found in the United States and Canada. In northern areas, it is sometimes referred to as the lake perch. This species is prized for its food quality and has often been raised in hatcheries and introduced into areas in which it is not native. Yellow perch are almost identical in appearance to European perch, but have a more yellow coloring. These fish typically only reach a size of about 15 in and 2.2 lb (1 kg). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Perch」の詳細全文を読む スポンサード リンク
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