Wild Caribbean reef fish anywhere in the Caribbean. The final island to be featured is Trinidad, cut off from South America by rising sea levels 2,000 years ago. Its island fauna include many mainland species such as red howler monkeys, capuchins and scarlet ibis. Coral reefs, which thrive in the warm, shallow waters around Caribbean Islands, are the subject of the second programme. Hard corals are the reef-builders, and grow their tough external skeletons by extracting nutrients from algae growing within them. Time-lapse footage shows coral polyps emerging at night to trap drifting plankton. Marine life featured includes Caribbean reef squid, octopus
Pamban Island kilometres from Dhanushkodi. Pamban, situated at the western edge of Pamban Island, is a fishing village and a harbour which is the main point of entry for the pilgrimage centre of Rameswaram. It has a population of around 9,000 inhabitants. Its importance has enhanced because it is located at the eastern end of Pamban Bridge through which supplies enter the island. Pamban is 11 kilometres from Rameswaram, 30 kilometres from the tip of Dhanushkodi and around 7 kilometres from Mandapam on the Indian mainland. It is separated from the Indian mainland by a narrow strip of sea. Thangachi Madam situated