borer
From ZooTerms (Dictionary of Invertebrate Zoology)
borer (noun; Anglo-Saxon borian, bore): 1. An invertebrate that bores.
2. (Arthropoda: Insecta) An adult or larva that makes channels in woody or vegetable tissue.
3. (Mollusca: Bivalvia) A pelecypod that burrows in stone or wood.
4. (Mollusca: Gastropoda) One that bores through the shell of an oyster or other mollusk.
