Although both its name and shape reminds us of a worm, the naval shipworm Teredo navalis is a bivalve mollusc. This species drills tunnels in wood and has dispersed all over the world seas, hitchhiking in the hulls of wooden ships and driftwood. Its early and universal spread makes it hard to determine where this species originally occurred. The naval shipworm has troubled sailors for centuries, because it affects the wood of ships.
- VLIZ Alien Species Consortium http://www.marinespecies.org/aphia.php?p=sourcedetails&id=132969