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Hinnites giganteus, more commonly known as the purple-hinged rock scallop, is a North American scallop distributed from the Aleutian Islands in Alaska to Baja, California. Like many scallops, the purple-hinged rock scallop is a filter-feeding consumer, and a hermaphrodite. Unlike most members of its genus, H. giganteus grows to a comparatively large size, and becomes completely sessile in maturity. If left undisturbed once it has cemented itself to a rock, H. giganteus can live for up to 25 years. The purple-hinged rock scallop is edible and has been over-fished by humans in many areas of its distribution.