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- Cabot Strait - between Newfoundland and Cape Breton Island
- Caicos Passage - between Turks and Caicos Islands and the Bahamas
- Carquinez Strait - connects San Pablo Bay and Suisun Bay, California
- Chatham Strait - between Chichagof Island and Admiralty Island, Alaska
- Chios Strait - between Turkey and the Greek island Chios
- Clarence Strait - between Prince of Wales Island and mainland Alaska
- Coco Channel - between the Burmese Coco Islands and the Indian North Andaman Island
- Colvos Passage - Puget Sound
- Cook Strait - between the North Island and South Island of New Zealand
Read more about this topic: List Of Straits