Family Azollaceae is a kind of aquatic fern family that is commonly referred to as mosquito ferns. These ferns have unique qualities as they can float on water and have a symbiotic relationship with nitrogen-fixing bacteria. Some of the common synonyms for the family Azollaceae include the water fern family, the duckweed fern family, and the mosquito fern family. This family is one of the smallest fern families, that contains only two closely related species in the genus Azolla. Apart from its ecological importance, these ferns also have some medicinal properties and are often used as a traditional herbal remedy for various health conditions.