Aerial view of the common water crowfoot (Ranunculus aquatilis). This aquatic plant grows in mats on the surface of water and is an important component of freshwater ecosystems. It helps to maintain water quality by filtering out pollutants and reducing the amount of sediment in the water. The common water crowfoot also provides a habitat for many animals and insects and helps prevent erosion. Photographed in the River Teifi, Wales, UK.