What are some facts about ocean ecosystems?

85 or 95% of the ocean have not been discovered. The ocean makes up more than half of the earths surface. Animals and Plants have adapted to the conditions of the ocean. Kelp is a large seaweed and one of the thirty algae in the ocean. Plankton serves as the foundation of the marine food chain. The Great Barrier Reef is 2300 km long and made of over 600 types of soft and hard corals.