Follow seahorse Hippo in his journey through one of the most important marine ecosystems in Portugal, the Seagrass Meadows of the Sado estuary. This place is as important for us, as for its inhabitants! Hereyou can get to know animals that can change their color, others that love to sing and others that can "see" through sound! You can not miss his next adventures through the most magical places in the Ocean, where you will have the opportunity to explore new underwater cities and discover their inhabitants, their importance, their threats and what can we do to protect them.