Phylum: Annelida

Class: Polychaeta

 

Norwegian: børsteormer

(Rye - The Trondheim fjord / 1.10.2004 / 12 meters)

The class Polychaeta includes two groups, the tubeworms - Sedentaria and the free living, or errant bristle worms, Errantia. These are not regarded as official taxonomic groups, because of significant irregularities among them.