The Teredo navalis problem

The wreck was well preserved up to the mid 1990's, but now it is extremely endangered by the shipworm Teredo navalis. In 1993, the shipworm entered the Baltic Sea when a big amount of North Sea saltwater passed the Store Belt. Teredo navalis adapted rapidly to the new ecological surroundings and started to reproduce. The worm has now reached the island of Rügen which means that the Darsser Cog is situated on the eastern border of the shipworm area.