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
North Caribbean Coast Autonomous Region North Caribbean Coast Autonomous Region The North Caribbean Coast Autonomous Region (, ), sometimes shortened to RACN, or RACCN (for North Caribbean Coast Autonomous Region), or RAAN (for its former name of ), is one of two autonomous regions in Nicaragua. It covers an area of 32,159 km² and has a population of 249,700 (2005 census). It is the largest autonomous region or department in Nicaragua. The capital is Puerto Cabezas. It contains part of the region known as the Mosquito Coast. The RACCN has a Regional Council of representatives of different political parties (such as the Sandinistas (FSLN) and