Species · GBIF taxon 2362635
Common Rudd
Scardinius erythrophthalmusAlso known as Rudd, Redeye, Pearl Roach
Common rudd thrive in the sunlit shallows of heavily vegetated lowland lakes, forming loose shoals that cruise through weed beds in search of food. Their upturned mouths allow them to graze efficiently on surface insects, filamentous algae, and submerged macrophyte shoots, an unusually plant-heavy diet for a European cyprinid. Spawning occurs in late spring among dense reed stems, where sticky eggs adhere to vegetation until fry hatch a week later.
FreshwaterShoalingOmnivorous

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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Diet & prey
- Pondweed
- Chironomid Larvae
- Water Fleas
Predators
- Northern Pike
- Eurasian Otter
- Grey Heron
ThreatsEutrophication, loss of aquatic macrophyte beds, and pollution
HabitatsSlow-flowing rivers, vegetated lowland lakes, canals, and reed-fringed ponds
Life span15–20 years
Size / weightNot available
Classification
- OrderCypriniformes
- FamilyCyprinidae
- GenusScardinius
- SpeciesScardinius erythrophthalmus
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Safe to observe at a normal distance.
Responsible observation
- Spotting Shoals: Look into calm, sunlit bays near thick lily pads or reed edges during warm afternoons.
- Angling Care: Use barbless hooks and wet hands to preserve their protective slime coat before release.
- Prevent Spread: Clean boat gear thoroughly to avoid spreading this species outside its native range.
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