Located in Oceania, Tonga is a small archipelago in the South Pacific Ocean, directly south of Samoa and about two-thirds of the way from Hawaii to New Zealand. It has 169 islands, 36 of them inhabited, which are in three main groups – Vavaʻu, Haʻapai, and Tongatapu – and cover an 800-kilometre (500-mile)-long north–south line. The total size is just 747 km2 (288 sq mi). Due to the spread out islands it has the 40th largest Exclusive Economic Zone of 659,558 km2 (254,657 sq mi).
Kāneʻohe Bay, at 45 km2 (17 sq mi), is the largest sheltered body of water in the main Hawaiian Islands. This reef-dominated embayment constitutes a significant scenic and recreational feature along the northeast coast of the Island of Oʻahu. The largest population center on Kāneʻohe Bay is the town of Kāneʻohe.
The Louisiade Archipelago is a string of ten larger volcanic islands frequently fringed by coral reefs, and 90 smaller coral islands in Papua New Guinea.
The Maldives are formed by 20 natural atolls, along with a few islands and isolated reefs today which form a pattern stretching from 7 degrees 10′ North to 0 degrees 45′ South. The largest of these atolls is Boduthiladhunmathi, while the atoll containing the most islands is Huvadhu.
The British Indian Ocean Territory (BIOT) is an archipelago of 55 islands in the Indian Ocean, located south of India. It is situated approximately halfway between Africa and Indonesia. The islands form a semicircular group with an open sea towards the east. The largest, Diego Garcia, is located at the southern extreme end. It measures 60 square kilometres (23 sq mi) and accounts for almost three-quarters of the total land area of the territory. Diego Garcia is the only inhabited island and is home to the joint UK-US naval support facility. Other islands within the archipelago include Danger Island, Three Brothers Islands, Nelson Island, and Peros Banhos, as well as the island groups of the Egmont Islands, Eagle Islands, and the Salomon Islands.
The Reef Islands are a loose collection of 16 islands in the in Temotu Province, in the independent nation of Solomon Islands. These islands have historically also been known by the names of Swallow Islands and Matema Islands.
The Saya de Malha Bank or Mesh Skirt Bank, is one of the largest submerged ocean banks in the world, a part of the vast undersea Mascarene Plateau.
The Great Chagos Bank, in the Chagos Archipelago, about 500 km (310 mi) south of Maldives, is the largest atoll structure in the world, with a total area of 12,642 km2 (4,881 sq mi). The atoll is administered by the United Kingdom through the British Indian Ocean Territory (BIOT).
Misima is a volcanic island in the northwest of Louisiade Archipelago within Milne Bay Province of Papua New Guinea.
The Rowley Shoals is a group of three atoll-like coral reefs south of the Timor Sea, about 260 km (160 mi) west of Broome on the northwestern Australian coast, centred on 17°20′S119°20′E, on the edge of one of the widest continental shelves in the world. Each atoll covers an area of around 80 to 90 km2 within the rim of the reef, including the lagoons, while the land areas are negligible. They belong to Western Australia. They all rise steeply from the surrounding ocean floor. To the northeast lie the Scott and Seringapatam Reefs which are located on the same undersea platform.
Rossel Island is the easternmost island of the Louisiade Archipelago, within the Milne Bay Province of Papua New Guinea. Tree Islet is situated 1.5 miles to the north-west, while Wule Island is situated 1.5 miles westward.
Sideia Island is an island in the Louisiade Archipelago in Milne Bay Province, Papua New Guinea.
The Deboyne Islands are an atoll, composed of a group of reefs and islands in the north of the Louisiade Archipelago, Papua New Guinea.
The Calvados Chain are a group of islands in the Solomon Sea, belonging to Papua New Guinea within the Louisiade Archipelago.
The Renard Islands are an archipelago in the Solomon Sea. Administratively they belong to Milne Bay Province in the southeastern region of Papua New Guinea.
The Strathord Islands are an uninhabited island group of five islands in the Louisiade Archipelago of Papua New Guinea. Politically they belong to the province of Milne Bay in the southeastern region of Papua New Guinea.
The Jomard Islands are an uninhabited island group in the Coral Sea, belonging to Papua New Guinea, It lies to the east of Montemont Islands in the Louisiade Archipelago.
The Engineer Islands are an archipelago in the Solomon Sea belonging to Papua New-Guinea.
The Samarai Islands archipelago, part of the larger Louisiade Archipelago, is located 50 kilometres (31 mi) southeast of mainland New Guinea island, within the nation of Papua New Guinea.
Milne Bay 
