Huge, salty seas and oceans make over two-thirds of Earth's surface a deep mystery. Discover this "other" world, from the coastal shores and tidal pools to the bottom of the Pacific's Mariana Trench—nearly eight miles below the waves. Get to know many unique ocean creatures including whales, sharks, plankton and pengui Sonlight resource: https://www.sonlight.com/products/the-usborne-first-encyclopedia-of-seas-and-oceans