Watch YouTube videos! This playlist is all about dolphins. Ultimate Shark book Get a sneak peek! Watch YouTube videos! This playlist is all about creatures that live in the deep sea. Check it out. Oceans Portal See what's in the sea! SEA STAR They have amazing stomachs! GIANT SQUID They're rarely seen by humans. Narwhal Their tusks are a mystery. Watch more videos! Visit Nat Geo Kids on YouTube. Cool Videos! Watch playlists on YouTube. Watch ocean videos! More Explorer Academy Play all the videos!