Atlantis is a new, underwater LEGO theme officially released in January 2010. It is mildly similar to the discontinued Aquazone, Aqua Raiders, and Divers themes. The theme features several new minifigure piece molds as well as a new breathing apparatus among other new elements, specifically the exclusive keys. The Deep Sea Salvage Crew are looking for The City of Atlantis and need to collect Keys to open the Portal to the City, while fighting Deep Sea Creatures.