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Scardinius erythrophthalmus

Scardinius erythrophthalmus, Photo: Michael Lahanas

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Osteichthyes
Classis: Actinopterygii
Subclassis: Neopterygii
Infraclassis: Teleostei
Superordo: Ostariophysi
Ordo: Cypriniformes
Subordo: Cyprinoidea
Familia: Cyprinidae
Subfamilia: Leuciscinae
Genus: Scardinius
Species: Scardinius erythrophthalmus

See Common Rudd

Vernacular Names

Ελληνικά: Κοκκινοφτέρα


The common rudd Scardinius erythropthalmus is a bentho-pelagic freshwater fish, widely spread in Europe and middle Asia, around the basins of the North, Baltic Black, Caspian and Aral seas. It has been artificially introduced to Ireland, USA, Morocco, Madagascar, Tunisia, New Zealand, Canada and Spain.


Morphologically, this species is very similar to the roach (Rutilus rutilus), with which it can be easily confused. It can be identified by the yellow eye colour. The eye of the roach has a big red spot above the pupil, that can be more or less conspicuous. The rudd has an upturned mouth allowing it to feed easily at the top of the water. The placement of the dorsal fin is more to the rear which is even visible in very young fish. There are normally only one or two scales between the tip of the pelvic fins and the anal fins, while on the roach there are five. Also the skin of the rudd is yellowish green, while the roach is bluish on the flanks. Also the upturned mouth is visible even in young fish. Furthermore the rudd's number of soft rays in the dorsal fin (8–9 compared to 10–12). There can be confusion with the ide also, which has smaller scales however.

The rudd can grow to a size of about 45 cm.


Rudd prefer clear waters rich in plants. They also feed on aquatic vegetation when the temperature exceeds 18°C. They hunt for living prey in the upper levels. They prefer mesotrophic waters, while the roach is sometimes found together with the perch in waters that are nutrient poor.


* Scardinius erythrophthalmus (TSN 163613). Integrated Taxonomic Information System. Retrieved on 19 March 2006.
* Froese, Rainer, and Daniel Pauly, eds. (2005). "Scardinius erythrophthalmus" in FishBase. November 2005 version.

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Source: Wikispecies, Wikipedia: All text is available under the terms of the GNU Free Documentation License