Klátovské rameno, National nature reserve in Dunajská Streda District, Slovakia.

Klátovské rameno is a right-bank tributary of the Malý Dunaj that rises from groundwater near Orechová Potôň-Lúky and has no surface source. In its upper course it breaks into small ponds with rich bank vegetation, only taking a continuous channel near the Csótfa hamlet. Its water depth ranges from a few centimetres to 5 metres.

The oxbow has no spring and does not branch off another watercourse; it rises from groundwater near Orechová Potôň-Lúky. The national nature reserve was declared in 1993 on 306.4 hectares, and from 1 January 2024 the site was included in Slovakia's national list of sites of European importance under the code SKUEV0075. The water mill by Dunajský Klátov was built in 1920 by Ján Csefalvay, damaged in World War II and reconstructed in 1987.

The reserve contains a historic water mill from 1920 in Dunajský Klátov village, which operated until 1950 and now serves as a museum showcasing traditional milling techniques.

Entering the water with any motorised or non-motorised craft is forbidden, and the Dunajský Klátov municipal office cannot grant an exemption. Boats must be carried around the mill weir near Dunajský Klátov, since the dam there is not navigable. The upper stretch has no continuous water surface, only ponds among dense bank vegetation, and its characteristic form appears near the Csótfa hamlet.

The reserve holds 32 species of freshwater molluscs, making it the second richest site of its kind in the Danubian Lowland. Surveys also recorded 102 beetle species, among them a Dorytomus beetle described as new to science.