This lesson begins by establishing the aims of the unit. The students will use the information in this unit to select and justify a site for a Marine Protected Area (MPA) off the coast of Belize. This lesson will cover the importance of coral reefs, the so called ‘rain forests of the sea’, to a local community in Timor-Leste. Students develop their understanding of mutualism, biodiversity and how it is useful and important to us and the Earth as a whole.