What is the function of the Parapodia in Nereis?

Nereis:

1. Nereis is also known as rag worm or clam worm.
2. Nereis belongs to phylum Annelida.
3. Lateral outgrowths from the body of an invertebrate are known as parapodia.
4. In Nereis, parapodia are locomotory organs.
5. Parapodia help in crawling and swimming.