Rutilus rutilus
| Rutilus rutilus | |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Cyprinidae |
| Genus: | Rutilus |
| Species: | R. rutilus |
| Binomial name | |
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Rutilus rutilus (Linnaeus, 1758) |
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The roach (Rutilus rutilus), also known as the common roach, is a fresh and brackish water fish of the Cyprinidae family, native to most of Europe and western Asia. The name "roach" is not unique, but fishes called roach can be any species of the genera Rutilus and Hesperoleucus, depending on locality. The plural of the term is also roach.
The roach is a small fish, often reaching no more than about 35 cm; maximum length is 45-50 cm. The body has a bluish silvery colour and becomes white at the belly. The fins are red. The number of scales along the lateral line is 39-48. The dorsal and anal fins have 12-14 rays. Young specimens have a slender build; older specimens acquire a higher and broader body shape. The roach can often be recognized by the big red spot in the iris above and beside the pupil. Colours of the eye and fins can be very pale, however, in some environments.
In Central and Northern Europe, the common roach can most easily be confused with the common rudd (Scardinius erythropthalmus), the dace (Leuciscus leuciscus), or the ide (Leuciscus idus). They can be distinguished, though, by these characteristics:
The common roach is found throughout Europe except for the area around the Mediterranean, and its distribution reaches eastward into Siberia. Eastern Europe and Asia have several subspecies, some with an anadromous lifecycle living around the Caspian and Black Seas. Around the Mediterranean and in northwestern part of Spain and Portugal, several closely related species occur with no overlap in their distribution.
It was introduced in Australia in the Murray River and coastal drainages of southern New South Wales and Victoria from Europe during the 1860s and 1880s for sport purposes.
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Wikipedia