Oceans of the past -- Oceans today -- Ocean life -- Waves and weather -- Sandy and muddy -- Soft sea bed -- Rocks underwater -- On the rocks -- The coral kingdom -- Life on a coral reef -- Sea meadows -- Predators -- Homes and hiding -- Attack and defense -- The jet set -- Moving along -- Ocean travelers -- The twilight zone -- The darkest depths -- On the bottom -- Deep heat -- Diverse divers -- Submarines -- Ocean explorers -- Wrecks on the sea bed -- Harvesting fish -- Ocean products -- Energy from the ocean -- Oceans in peril -- Did you know? -- The world's oceans -- Find out more -- Glossary.