Dragonfly larva, also known as nymphs, are aquatic insects that undergo incomplete metamorphosis. They are the immature stage of the dragonfly and look like small versions of the adult dragonfly. Nymphs live in freshwater habitats and feed on other aquatic organisms such as mosquito larvae and small fish. They have a long life cycle, with some species taking up to five years to reach adulthood. Dragonfly nymphs are important predators in aquatic ecosystems, helping to keep populations of other organisms in balance.