A genus of long, slender, wormlike bivalve mollusks which bore into submerged wood, such as the piles of wharves, bottoms of ships, etc.; -- called also shipworm. See Shipworm. See Illust. in Appendix.

A boring mollusc very destructive of wood in salt water. ( BCFT).

typical shipworm

See Marine Borer.

A marine borer that damages untreated wood by drilling holes in it.