Common rudd

The common rudd is a freshwater fish native to Europe and Asia, particularly around the North, Baltic, Black, Caspian, and Aral Seas. Over the years, it has been introduced to various countries, including Ireland, the United States, Morocco, Madagascar, Norway, Tunisia, New Zealand, Canada, and Spain. In the U.S., rudd populations have been found in several states. However, their introduction can be detrimental to local ecosystems, as demonstrated in New Zealand, where they were illegally introduced in the 1960s.

The rudd closely resembles the roach but can be distinguished by its yellow eyes and upturned mouth. These fish can grow to about 45-50 cm in length and have distinctive fin colors. They thrive in clear, plant-rich waters and feed on both aquatic vegetation and live prey. Rudd spawn in shallow, weedy areas, with females laying up to 200,000 eggs. Juvenile rudd consume zooplankton and insects, while adults predominantly eat aquatic plants. They are adaptable to a wide range of temperatures and water conditions, including polluted or nutrient-rich waters. Rudd can live up to 17 years and reach sexual maturity at 2-3 years old.

Given their potential to disrupt ecosystems, some states, like Alabama and Tennessee, have regulations prohibiting the possession or transportation of live rudd. It is crucial to prevent the spread of this invasive species to safeguard native aquatic environments.