Advantages and Disadvantages (of Movement)

The disadvantage of this sort of movement is that on land and in water, the annelids are very slow. So slow that the ones on land are preyed upon often, and thus spend most of their time underground, only popping up occasionally. The ones in the water are slightly better off, as they can move a bit faster, but still spend most of their time hiding or burrowed in the ground.


An advantage is that this sort of movement allows for them to eat while they move, a trait that must come in handy. For example, the earthworm must ingest the soil as moves through the soil, otherwise it can not make much headway. The earthworm then poops it out, and in that process, made the soil richer and more fertile. Without this need, the earth would be pretty barren, as earthworms help the soil become more rich wherever they go.