phyllopodia
Phyllopodia are leaf-like appendages found in some aquatic invertebrates, most notably in certain species of copepods. These structures are typically flattened and broad, resembling small leaves, and are used for a variety of functions. Their primary role is often related to locomotion, acting as paddles or fins to propel the organism through the water. In some cases, phyllopodia may also aid in buoyancy, helping the animal to remain suspended at a desired depth. Additionally, these appendages can be involved in feeding. They might be used to sweep small food particles towards the mouth, or in some species, they can be adapted for capturing prey directly. The morphology and specific functions of phyllopodia can vary significantly between different species, reflecting adaptations to diverse ecological niches and feeding strategies. Their presence is a notable characteristic that distinguishes certain groups of crustaceans.