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Oceans of the World. By: Lindsay and Rebecca. Ocean Zones. Sunlit Zone: Top layer, nearest the surface. E nough light to support photosynthesis .
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Oceans of the World By: Lindsay and Rebecca
Ocean Zones • Sunlit Zone: Top layer, nearest the surface. Enough light to support photosynthesis. • Twilight Zone:Small amount of light penetrates the water. Water becomes deeper, and pressure increase, too. Plants do not grow here. Only animals that have adapted to little light survive.
Midnight Zone: 90% of the ocean is in the midnight zone. Entirely dark. Water pressure is extreme. Temperature is near freezing. • Special forms of bacteria use hydrogen sulfide to make food. All other living things in this zone eat the bacteria.
Atlantic Ocean • Area= 82 million square km • Average depth= 11,812 ft • Greatest depth= 28,231 ft • Endangered species: • Manatee • Seals • Sea lions • Turtles • Whales
Arctic Ocean • Area= 12 million square km • Average depth: 3,450 ft • Fragile ecosystem slow to change and slow to recover from disruptions or damage. • Endangered species: • Whales • Walruses
Indian Ocean • Area= 73 million square km • Average depth= 12,762 ft • Greatest depth= 25,344 ft • Endangered species: • dugong • Seals • turtles • whales
Pacific Ocean • Area= 166 million square km • Average depth= 14,000 ft • Greatest depth= 35,797 ft • Endangered species: • Dugong • sea lion • sea otter • seals • turtles • whales