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A slide of a map showing sites of the quahog spawner sanctuaries. The quahogspawner sanctuaries were established to compensate for injuries to shellfishafter oil spilled in Narragansett Bay when the World Prodigy ship grounded in1989. Quahogs were taken from polluted areas of Narragansett Bay and allowed todepurate and then moved into clean areas where they were protected from harvest.