From the smallest creatures in the world to the largest animals of all sorts, live in the vast oceans, some of the tiniest creatures called plankton are also among the most important to life in the ocean. Plankton include shrimp like creatures known as krill and copepods. They commonly live in the open sea and provide food for many other sea animals, including many fish and even some whales. The frigid waters of the polar seas contain such animals as cod, halibut, Seals and whales. Many animals thrive in the coral reefs of warm tropical seas, including lobsters and many types of brightly coloured fish. Various ocean animals can live in shallow water near the shore, in tidal pools and on rocks. They include anemones, cornicles, Muscles, octopuses and starfish. The great depths of the ocean are completely dark, and the water there is bitterly cold. Even so, animals such as angler fish, plants and two worms live in these harsh environments. Animals such as flying fish, Manta rays, larvae and porpoises generally stay close to the Ocean's surface. Just above these animals, albatrosses, gulls.