Pedro Bank is a large bank of sand and coral, partially covered with seagrass, about 80 km south and southwest of Jamaica, rising steeply from a seabed of 800 metres depth. It slopes gently from Pedro Cays to the west and north with depths from 13 to 30 metres (43–98 feet). The total area of the bank within the 100 metres (328 feet) isobath measures 8,040 square kilometres (3,104 square miles). The area of a depth to 40 metres (130 feet) is triangular, 70 kilometres (43 miles) long east-west, and 43 kilometres (27 miles) wide. 2,400 square kilometres (927 square miles) are less than 20 metres (66 feet) deep. With its islets, cays and rocks, a total land area of 270,000 m (2,906,256 sq ft), it is the location of one of the two offshore island groups of Jamaica, the other one being the Morant Cays (Jamaica also has nearshore islands like the Port Royal Cays). The bank is centered at 17°06′N 78°20′W / 17.100°N 78.333°W / 17.100; -78.333 (Pedro Bank).