country oroluk atoll
A lagoon is a shallow body of water separated from a larger body of water by barrier islands or reefs . Lagoons are commonly divided into coastal lagoons and atoll lagoons . They have also been identified as occurring on mixed - sand and gravel coastlines . There is an overlap between bodies of water classified as coastal lagoons and bodies of water classified as estuaries . Lagoons are common coastal features around many parts of the ___MASK42___ . Kosrae ( pronunciation : " kosh -"), formerly known as Kusaie , is an island in ___MASK54___ . The State of Kosrae is one of the four states of the ___MASK54___ , and includes the main island of Kosrae and a few nearby islands and islets , the most significant of which is inhabited ( 1 , 500 people ) Lelu Island . Oroluk Atoll is an atoll belonging to Pohnpei State in the Micronesia . An atoll (, , , or ), sometimes called 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 / cays on the rim . Yap State is one of the four states of the ___MASK54___ ( FSM ). The other states are Kosrae State , Pohnpei State , and Chuuk State . The ___MASK54___ ( abbreviated FSM and also known simply as Micronesia ) is an independent sovereign island nation and a United States associated state consisting of four states from west to east , Yap , Chuuk , Pohnpei and Kosraethat are spread across the Western Pacific Ocean . Together , the states comprise around 607 islands ( a combined land area of approximately ) that cover a longitudinal distance of almost just north of the equator . They lie northeast of New Guinea , south of Guam and the Marianas , west of Nauru and the Marshall Islands , east of Palau and the Philippines , about north of eastern Australia and some southwest of the main islands of Hawaii . Chuuk State ( also known as Truk ) is one of the four states of the ___MASK54___ ( FSM ). The other states are Kosrae State , Pohnpei State , and Yap State . It consists of several island groups : Chuuk is the most populous state of the FSM with its 50 , 000 inhabitants on . Chuuk Lagoon is where most people live . Weno island in the Lagoon functions as state capital and is FSM ' s biggest city . Pohnpei " upon (" pohn ") a stone altar (" pei ")" ( formerly known as Ponape ) is an island of the Senyavin Islands which are part of the larger Caroline Islands group . It belongs to Pohnpei State , one of the four states in the ___MASK54___ ( FSM ). Major population centers on Pohnpei include Palikir , the FSM ' s capital , and Kolonia , the capital of Pohnpei State . Pohnpei Island is the largest ( 334 km² ), highest ( almost 800m ), most populous ( 34 , 000 people ), and most developed single island in the FSM . The islanders of Pohnpei have a reputation as being the most welcoming of outsiders among residents of the island group . Pohnpei State is one of the four states of the ___MASK54___ ( FSM ). The other states are , from the east , Kosrae State , Chuuk State , and Yap State . The state ' s principal island is Pohnpei . A cay ( or ), also spelled caye or key , is a small , low - elevation , sandy island on the surface of a coral reef . Cays occur in tropical environments throughout the Pacific , Atlantic and Indian Oceans ( including in the Caribbean and on the Great Barrier Reef and ___MASK61___ Barrier Reef ).