Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

 

Search in the Encyclopedia

Great shipworm

size:

up to 12 centimeters

color:

yellow-white or white

food:

phytoplankton

enemies:

none

reproduction:

sexual

  • Dut: Paalworm
  • Lat: Teredo navalis
  • Eng: Great shipworm
  • Ger: Schiffsbohrwum
Great shipworm, Stefan Gollasch

Great shipworm

Despite its name, the great shipworm is a bivalve. However the shells are small in relation to the animal, resembling more like a worm. It drills holes in wood which is in contact with the sea. Just like piddocks, the animal does not live off of the wood but drills the passages to protect itself.

  • The pain of God
    Great shipworm, Stefan Gollasch

    In the 17th century, the great shipworm was mentioned by the historian Pieter Cornelisz Hooft. He said that the animal was already seen in 1580 in the wooden dike piling of Zeeland. The great shipworm was (re)introduced in the 18th century via wooden ships and destroyed all wooden dike piling along the coast in a rapid tempo. One saw the arrival of this damaging animal as a punishment from God for the haughtiness, the mores-less behaviour and the extravagant enrichment of the Dutch population.
    Nowadays, the worm is known for the damage it causes on ship wrecks in the Wadden Sea.
    Certain kinds of tropical hardwood can withstand the great shipworm, other wood must be coated with copper or drenched in creosote oil in order to protect itself from the great shipworm. The great shipworm is still fairly common in pieces of (washed-up) wood.