The Vietnam Book of Records Saturday announced nine records involving the country's sea and islands on the occasion of the Vietnam Sea and Island Week (June 1-8).
The recognition was an effort to promote the natural features and products of the nation's seas and islands to local and international visitors, the organization said in a statement.
Tra Co Beach in Quang Ninh Province is recognized as the longest beach, stretching 17 kilometers.
Ha Long Bay is listed as the one with the highest number of islets (1,169) in the country.
Truong Sa (Spratly) Islands, located 243 nautical miles from Khanh Hoa Province is recognized as the most remote island.
Tam Giang Cau Hai in Thua Thien Hue Province is the largest lagoon with 21,600 hectares.
Hai Phong City's Cat Ba has the highest number of islands at 367, while Ca Mau Province's Hon Khoai is the southernmost island.
Kien Giang Province's Phu Quoc is the largest island with an area of 561 square kilometers; and Khanh Hoa Province's Nam Yet is the biggest marine reserve with an area of 35,000 hectares.
Quang Ngai Province's Ly Son is the most densely populated island with 1,888 people per square kilometer.