The paired appendages that are laterally present in the Annelids’ body segments are known as parapodia.
Locomotion, eating, and respiration are the three basic tasks of parapodia.
Nephridia are segmented organs that assist in the removal of metabolic waste from the body, or excretion.
For locomotion, Nereis have setae and parapodia.
Final Answer:
Parapodia are found in aquatic species of the phylum Annelida, such as Nereis. Swimming is aided by parapodia, which are lateral appendages.