<p><strong>Fig. 3.43.</strong>&nbsp;(<strong>D</strong>) Christmas tree worms (<em>Spirobranchus</em> spp.) live embedded in hard coral skeletons and are examples of sessile or sedentary polychaetes.</p>

Fig. 3.43. (D) Christmas tree worms (Spirobranchus spp.) live embedded in hard coral skeletons and are examples of sessile or sedentary polychaetes.

Image courtesy of Daniel Dietrich, Flickr