The Coral Sea Islands Territory is an external territory of Australia which comprises a group of small and mostly uninhabited tropical islands and reefs in the Coral Sea, northeast of Queensland, Australia. The only inhabited island is Willis Island. The territory covers 780,000 km2 (301,160 sq mi), most of which is ocean, extending east and south from the outer edge of the Great Barrier Reef and includes Heralds Beacon Island, Osprey Reef, the Willis Group and fifteen other reef/island groups. Cato Island is the highest point in the Territory.
Jamaica lies 140 km (90 mi) south of Cuba and 190 km (118 mi) west of Haiti. At its greatest extent, Jamaica is 235 km (146 mi) long, and its width varies between 34 and 84 km. Jamaica has a small area of 10,992 km2 (4,244 sq mi). However, Jamaica is the largest island of the Commonwealth Caribbean and the third largest of the Greater Antilles, after Cuba and Hispaniola. Many small islands are located along the south coast of Jamaica, such as the Port Royal Cays. Southwest of mainland Jamaica lies Pedro Bank, an area of shallow seas, with a number of cays, extending generally east to west for over 160 km (99 mi). To the southeast lies Morant Bank, with the Morant Cays, 51 km (32 mi) from Morant Point, the easternmost point of mainland Jamaica. Alice Shoal, 260 km (160 mi) southwest of the main island of Jamaica, falls within the Jamaica–Colombia Joint Regime. It has an Exclusive Economic Zone of 258,137 km2 (99,667 sq mi).
Nauru is a tiny phosphate rock island nation located in the South Pacific Ocean south of the Marshall Islands in Oceania. It is only 53 kilometres (33 mi) south of the Equator at coordinates 0°32′S166°55′E. Nauru is one of the three great phosphate rock islands in the Pacific Ocean—the others are Banaba in Kiribati and Makatea in French Polynesia.
An atoll, sometimes known as a coral atoll, is a ring-shaped coral reef, including a coral rim that encircles a lagoon partially or completely. There may be coral islands or cays on the rim. Atolls are located in warm tropical or subtropical oceans and seas where corals can grow. Most of the approximately 440 atolls in the world are in the Pacific Ocean.
Maldives is an island country in the Indian Ocean, South Asia, south-southwest of India. It has a total land size of 298 km2 (115 sq mi) which makes it the smallest country in Asia. It consists of approximately 1,190 coral islands grouped in a double chain of 26 atolls, spread over roughly 90,000 square kilometers, making this one of the most geographically dispersed countries in the world. It has the 31st largest exclusive economic zone of 923,322 km2 (356,497 sq mi). Composed of live coral reefs and sand bars, the atolls are situated atop a submarine ridge, 960 km (600 mi) long that rises abruptly from the depths of the Indian Ocean and runs from north to south. Only near the southern end of this natural coral barricade do two open passages permit safe ship navigation from one side of the Indian Ocean to the other through the territorial waters of Maldives. For administrative purposes the Maldives government organized these atolls into twenty-one administrative divisions.
Macclesfield Bank is an elongated sunken atoll of underwater reefs and shoals in the South China Sea. It lies east of the Paracel Islands, southwest of Pratas Island and north of the Spratly Islands. It is about 130 km (81 mi) long from southwest to northeast, and about 70 km (43 mi) wide at its broadest part. With an ocean area of 6,448 km2 (2,490 sq mi) it is one of the largest atolls of the world. The Macclesfield Bank is part of what China calls the Zhongsha Islands, which includes a number of geographically separate submarine features, and also refers to a county-level administrative division.
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 Saya de Malha Bank is the largest submerged ocean bank in the world, a part of the vast undersea Mascarene Plateau.
Kayangel (Ngcheangel) is the northernmost state of Palau 24 km (15 mi) north of Koror. The land area is about 1.4 km2 (0.54 sq mi). The population is 54.
Okinotorishima, or Parece Vela, is a coral reef with two rocks enlarged with tetrapod-cement structures. It is administered by Japan with a total shoal area of 8,482 m2 and land area 9.44 square metres (101.6 sq ft). Its dry land area is mostly made up by three concrete encasings and there is a 100 by 50 m stilt platform in the lagoon housing a research station. There is a third completely artificial tetrapod-cement islet. It is located on the Palau–Kyushu Ridge in the Philippine Sea, 534 km (332 mi) southeast of Okidaitōjima and 567 km (352 mi) west-southwest of South Iwo Jima in the Bonin Islands or 1,740 km (1,080 mi) south of Tokyo, Japan. The atoll is the southernmost part of Japan and the only Japanese territory south of the Tropic of Cancer.
The Great Blue Hole is a giant marine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km (43 mi) from the mainland and Belize City. The hole is circular in shape, 318 m (1,043 ft) across and 124 m (407 ft) deep. It has a surface area of 70,650 square metres (760,500 sq ft). It was formed during several episodes of quaternary glaciation when sea levels were much lower. Analysis of stalactites found in the Great Blue Hole shows that formation took place 153,000, 66,000, 60,000, and 15,000 years ago. As the ocean began to rise again, the cave was flooded. The Great Blue Hole is a part of the larger Belize Barrier Reef Reserve System, a UNESCO World Heritage Site.
Lyra Reef is a remote submerged coral atoll, about 40 kilometres (25 mi) in diameter, extending over an area of 1,300 square kilometres (500 sq mi). It lies about 200 kilometres (120 mi) north-east of New Ireland in the Bismarck Archipelago of Papua New Guinea, and 150 kilometres (93 mi) north-east of Simberi Island, the closest island, and about the same distance north-west of the Nuguria Islands.
Rosalind Bank, also called Rosalinda or Rosa Linda Bank, is a large, completely submerged bank or atoll in the western Caribbean Sea. It is the culmination of an area of coral reef, some 300 km long, that extends eastward from Cabo Gracias a Dios. The bank area is part of an extensive structure, known as Nicaragua Rise, that continues further east through Pedro Bank towards Jamaica.
The Misteriosa Bank is a submerged bank or atoll in the Caribbean Sea, located at 18°48′N83°54′W – approximately equidistant from Mexico, Honduras and Cuba.
Apo Reef is a coral reef system in the Philippines situated in the western waters of Occidental Mindoro province in the Mindoro Strait. Encompassing 34 square kilometres (13 sq mi), it is considered the world's second-largest contiguous coral reef system, and is the largest in the country. The reef and its surrounding waters are protected areas administered as the Apo Reef Natural Park (ARNP). It is one of the best known and most popular diving regions in the country, and is in the tentative list for UNESCO World Heritage Sites.
The habitat of deep-water corals, also known as cold-water corals, extends to deeper, darker parts of the oceans than tropical corals, ranging from near the surface to the abyss, beyond 2,000 metres (6,600 ft) where water temperatures may be as cold as 4 °C (39 °F). Deep-water corals belong to the Phylum Cnidaria and are most often stony corals, but also include black and thorny corals and soft corals including the Gorgonians. Like tropical corals, they provide habitat to other species, but deep-water corals do not require zooxanthellae to survive.
Kadmat Island, also known as Cardamom Island, is a coral island belonging to the Amindivi subgroup of islands of the Lakshadweep archipelago in India. Measuring 9.3 kilometres (5.8 mi) in length, the island has a lagoon with a width of 1.5 kilometres (0.93 mi) covering an area of 25 square kilometres (9.7 sq mi). The ecological feature of the island is of coral reef with seagrass, and marine turtles which nestle here. The Ministry of Environment and Forests (India) has notified the island as a marine protected area for ensuring conservation of the island's animal, plant, or other type of organism, and other resources.
The Saba Conservation Foundation (SCF) is a non-governmental organization that is concerned with the conservation of the natural and cultural heritage of the small Caribbean island of Saba, which is a part of the Kingdom of the Netherlands. Saba is part of the inner arc of the Leeward Islands chain of the Lesser Antilles.
The Tizard Bank, 10°15′N114°30′E is a partially sunken atoll and one of the significant maritime features of the north-western part of the Spratly Islands. It is claimed by the People's Republic of China, the Republic of China, and Vietnam, and various parts of it are occupied by these states.
Saint Joseph Atoll is part of the Amirante Islands group, which are in the Outer Islands coral archipelago of the Seychelles islands and nation. The atoll is located southwest of the granitic Inner Seychelles archipelago, with a distance of 248 km south of Victoria, Seychelles.
