Classes in this phylum:
The freshwater nereid that uses circular
segments to negotiate its environment.
The devious nereid that hides among its
wermite cousins and preys upon them.
The tiny nereid that links together in long strings to lengthen the collective digestive tract.
The wormlike creature that cuts
floating trees from the ground.
The insidious parasite finding its
home in the bodies of herbivores.