Ceratophyllaceae, commonly known as hornworts, is a family of aquatic plants primarily found in freshwater environments. These plants are characterized by their finely divided leaves and lack of true roots, which allows them to float or anchor in sediment. They play a vital role in aquatic ecosystems by providing habitat and food for various organisms. The family includes the genus Ceratophyllum, which is often used in aquariums for its aesthetic appeal and ability to improve water quality. Hornworts can reproduce both sexually and asexually, contributing to their adaptability in diverse aquatic habitats.