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To report an AIS
sighting or to find out
more information call
1-888-WDFW-AIS

Questions or comments regarding the state's Aquatic Invasive Species and Ballast Water Management Programs may be directed to:

Allen Pleus
AIS Coordinator
(360) 902-2724
Allen.Pleus@dfw.wa.gov

 
View WAC 220-12-090
Classification - Nonnative aquatic
animal species with photos

Scardinius erythropthalmus (Rudd)

Animal Fish
Family: Cyprinidae
Classification: Prohibited

Golden Rudd
Golden Rudd

Silver Rudd
Silver Rudd

The Rudd is common to Europe. It prefers shallow weedy areas in lakes and river backwaters, where mature females lay up to 200,000 eggs on submerged vegetation. Young Rudd eat zooplankton, aquatic insects, and occasionally other small fish. Mature Rudd, which are about 18” in length and weigh about 3 pounds, eat mostly aquatic vegetation. The Rudd can consume up to 40% of their body weight in vegetation per day, as much as 80% of which is discharged as waste, releasing nutrients into the water column. They can tolerate a wide range of temperatures and water conditions, including eutrophic or polluted waters. In the laboratory Rudd readily hybridize with the U.S. golden shiner (Notemigonus crysoleucas). They come in both silver and gold, and are sometimes sold as pond ornamentals.