The Caribbean is a region that consists of the Caribbean Sea, its islands, and the surrounding coasts.
Situated largely on the Caribbean Plate, the region comprises more than 700 islands, islets, reefs, and cays. These islands generally form island arcs that delineate the eastern and northern edges of the Caribbean Sea. The Caribbean islands, consisting of the Greater Antilles on the north and the Lesser Antilles on the south and east (including the Leeward Antilles), are part of the somewhat larger West Indies grouping, which also includes the Lucayan Archipelago (comprising the Bahamas and Turks and Caicos Islands) north of the Greater Antilles and Caribbean Sea. In a wider sense, the mainland countries of Belize, Guyana, and Suriname – may be included.
The waters of the Caribbean Sea host large, migratory schools of fish, turtles, and coral reef formations. The Puerto Rico trench, located on the fringe of the Atlantic Ocean and Caribbean Sea just to the north of the island of Puerto Rico, is the deepest point in all of the Atlantic Ocean.