What is an Ocean: large body of water. What % of the world is water: 70%. What type of water is in the Ocean: salt water. Where coral and fish live: Sunlight Zone. Dark, but some fish live here: Twilight Zone. VERY Dark, not much life: Midnight Zone. Animal with a hard body: Coral. What is the purpose of the kelp forest: protect fish. Has thick fur, floats on back: Sea Otter. round with spikes: Sea Urchin. NOT a fish, can have up to 50 arms: Sea Star. largest animal on Earth: Great White Shark. No heart or brain. Stinging tentacles: Jellyfish