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
Dazhou Island Dazhou Island Dazhou Island (commonly known as Grand Island or Tinhosa Island) is a state-level nature reserve located about 5 km off the coast of Wanning, Hainan, China. This protected area covers 4.36 square kilometres, and comprises three mountains spanning two islands. These mountains, the tallest of which is 289 metres above sea level, have been used as navigational markers by mariners since the Tang Dynasty. The islands are composed of mainly rain forests and rocky terrain. This group of two islands is home to more than one hundred individual flocks of swifts. These swifts, the only colonies in China,