Solution:Kyushu Isalnd (Japan) is not a Coral Reef Island. A coral island is a type of island formed from coral detritus and associated organic material. It occur in tropical and sub-tropical areas, typically as part of coral reefs which have grown to cover a far larger area under the sea.The Great Barrier Reef is the world's largest Coral Reef System composed of over 2900 individual reefs and 900 islands stretching for over 2,300 km over an area of approximately 344,400 km². The reef is located in the Coral Sea, off the Coast of Queensland, Australia.
The Rainbow Reef is a reef in the Somosomo Strait between the Fijian islands of Taveuni and Vanua Levu. It is one of the most famous dive sites in the South Pacific.
Swaraj Island is part of Ritchie's Archipelago, in India's Andaman Islands. It's known for its dive sites and beaches, like Elephant Beach, with its coral reefs.