This clam is native to the coasts of the Indian, Philippines and Pacific Oceans from Pakistan and India north to China, Japan, Korea and the Kuril Islands. It has a very wide nonnative distribution, having been introduced accidentally and purposely as a commercially harvested edible clam. It is now permanently established in coastal ecosystems in many parts of the world. It is common along the Pacific coast of North America from British Columbia to California, where its original introduction was accidental. It can be found in Hawaii. It was first seeded in the waters of Europe in the 1970s, and there have been multiple introductions throughout the region. It has spread naturally in Western Europe over the decades, its adaptability allowing it to thrive in many coastal habitat types. It has been planted in Portugal, Spain, the United Kingdom, Italy, Germany, Morocco, Israel, and French Polynesia for the purposes of aquaculture.
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