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
Coast Guard Island Naval Engineering Support Unit Alameda (NESU Alameda were also located on the island until those units were decommissioned in 2013. The functions and capabilities of the units remain as departments within Base Alameda. The facilities on Coast Guard Island also include an industrial service center, enlisted barracks, a medical and dental clinic, and public works facilities to service the island. Originally known as Government Island, this artificial island was formed in 1913 by the dredging project that extended the Oakland Estuary to San Leandro Bay. The Coast Guard first came to the island in 1926 when it established "Base 11"