description Dog Whelk (Nucella lapillus) Overview
The Dog Whelk (Nucella lapillus) is a predatory marine gastropod that lives on rocky shores around the North Atlantic. It feeds on attached shellfish, including barnacles and mussels, by drilling or chemically weakening their shells. The species was historically used as a source of purple dye, although its importance as a biological indicator is more recent. Reproductive abnormalities in dog whelks can reveal exposure to tributyltin, a pollutant formerly used in marine antifouling paints.
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