Investigate shipwrecks where scorpion fish hide, dive down to the Mariana trench to meet a dumbo octopus, marvel at ocean giants and dart in between manatees in mangrove forests to find out why oceans are magnificently mega! Did you know lobsters keep their teeth in their tummies? Or that you can find rivers and lakes beneath the ocean? And did you know that sea stars have no brain or blood? Explore the wonders of our underwater worlds on every page, from coral reefs, sharks and the deep to shipwrecks, weird fish and frozen seas, there's so much to discover.