A shallow oxbow lake with swampy shores in the lower Danube basin. Habitats are dynamic and depend on the lake’s water level which changes according to the Danube’s seasonal discharge. Vegetation consists mainly of emergent species. The lake usually only freezes for short periods and so it provides ideal winter habitat for ducks and geese; the number of birds frequently exceeds 20,000 individuals. Rare bird species at the Site include the vulnerable common pochard (Aythya ferina) and the near-threatened Dalmatian pelican (Pelecanus crispus). The Site is also important as a breeding and nursery area for amphibians and fish such as the black sea herring (Alosa immaculata). Human activities include environmental education, recreation, fishing, and reed harvesting. Water is used for irrigation and drinking. Threats to the Site include invasive alien species and pollution from agricultural and forestry effluents. The Site’s boundary was delineated more accurately in 2021, increasing the recorded area by almost 7,000 hectares.