Most of Earth is covered by saltwater found in our oceans and seas. In this movie, you’ll explore three ocean layers: the sunlit zone, twilight zone, and midnight zone. You'll learn about marine plants and animals like coral, phytoplankton, krill, fish, eels, mollusks, dolphins, and whales. See how oil spills and other forms of pollution can change ocean habitats, and how endangered fish can affect food chains and ocean life. What can you do to protect ocean environments? Watch the movie to find out!