Graphite and colored pencil Adult polychaete worms live in the sediment on the sea floor, but their larvae live as zooplankton before settling to the bottom to live in the mud. The larvae on the right is an earlier stage and the two on the left are later stage larvae that are starting to look more like worms. Leave a Reply Cancel Reply Your email address will not be published. Name* Email* Website Comment Notify me of follow-up comments by email. Notify me of new posts by email.