A fen is a type of wetland that is characterized by waterlogged soil and a variety of plant life. Fens are typically found in low-lying areas and are fed by groundwater, which makes them different from marshes. They often support a diverse range of flora, including grasses, sedges, and wildflowers, and can be home to various animal species. Fens play an important role in the ecosystem by filtering water and providing habitat for wildlife. They can also help in carbon storage, which contributes to climate regulation. Many fens are protected areas due to their ecological significance and the unique biodiversity they support.