0 a type of mollusc (= a type of creature that has a soft body, no spine, and is often covered with a shell) that lives in the sea and that can damage wooden structures by making holes in them: --
What does present a problem is that in order for the silica to be effective against shipworms it needs to dry to some degree in order to harden.
These poles had been eaten by shipworm.
The new bridge cost $26,700, not including $362 to remove the shipworm-infested remains of the 1869 wooden bridge.
A large log is present in the park, and this is full of tubular shipworm fossils.
Thus, it was also used to sheathe the piles of piers in tropical seas, as a protection against teredo shipworms, and in locomotive tubes.
Shipworms penetrated the copper sheathing at the nail holes, however, making the effort an expensive failure.
Its lightweight wood (specific gravity of 0.27) is resistant to termites and shipworms, so is used as timber for structures and outrigger canoes.
The drag from the hull growth cut the speed and the shipworm caused severe hull damage, especially in tropical waters.
