Ocenebra inornata common names the "Asian drill", the "Asian oyster drill", the "Japanese oyster drill" and the "Japanese oyster borer", is a species of small predatory sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails. This species is native to Asia (Japan and Korea), but it has become a notorious introduced pest species in oyster beds in the western USA and Europe.

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