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
Yarok Island Yarok Island Yarok Island () is an island in the Laptev Sea, a marginal sea of the Arctic Ocean. The island is located off the mouths of the Yana river, only a few kilometres towards the east. Administratively, Yarok Island is part of the Sakha Republic of Russia. Yarok Island is large and flat. It has many small lakes, swamps and sandbars. Its length is and its maximum breadth is . The Yana delta, the coastal area off which Yarok Island lies, is an extensive wetland zone. It is subject to severe Arctic weather with frequent gales and blizzards. Further