Oceans guide

Pacific Ocean, which separates Asia and Australia from the Americas # Atlantic Ocean, which separates the Americas from Eurasia and Africa

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Indian Ocean, which washes upon southern Asia and separates Africa and Australia

Southern Ocean, sometimes subsumed as the southern portions of the Pacific, Atlantic, and Indian Oceans, which encircles Antarctica and covers much of the Antarctic

Arctic Ocean, sometimes considered a sea of the Atlantic, which covers much of the Arctic and washes upon northern North America and Eurasia

9 Things About Ocean Life

1. Ocean life can go from the surface to ... 2.5 km (1.5 miles) beneath the ocean floor. That is where live bacteria were found!

2. At a depth of 5 meters (16 feet), 50% of sunlight is absorbed already. At a depth of 25 m (83 ft), only 3% of sunlight penetrates.

3. The base of the ocean food chain is made by the plankton, the microscopic algae and small animals feed on them. Plants (phytoplankton) to carry out photosynthesis, while animals (zooplankton), stay for the day at depths of 300-600 m (1,000-2,000 m) to avoid surface predators. The crustacean zooplankton ago, the worms and larvae of many fish and shellfish.

4. The jellyfish are considered plankton. They vary from 1 cm (0.4 inches) in diameter and 2 meters (6.6 feet). Jellyfish, Portuguese Man O 'War is the most dangerous species to humans, with its 30 m (100 feet) long tentacles.

5. Did you know that sharks and rays can not move backwards? While bony fish have swim bladders for buoyancy, sharks and rays its huge fatty livers for this purpose.

6. The biggest fish of the bones in the sea is the ocean sunfish (Mola). The two tons of fish is maintained at a depth of 300-400 m (1,000-1,300 feet) day and climb to the surface at night to feed on plankton.

The world's largest fish, the whale shark, up 2.65 meters (41.5 feet) long and weighs more than 21.5 tonnes, also feed on plankton. Manta, up to 7 m (23 feet) between his "wing" tips, is also a plankton eater.

7. Fish that live at depths of more than 1 km (0.6 miles) are considered ocean.

8. Sea snakes can stay up to 8 hours underwater. Only a few sea snakes out of the water to lay their eggs. The venom of sea snakes is more powerful than the Cobra, paralyzing the victim.

9. Some submarine volcanoes, living communities of form, not based on solar energy, but on Earth. Giant clams, the size of a plate, mussels, crabs, fish, octopus, snails, sea cucumbers and huge tubeworms (up to 3.5 meters or 12 feet) in vivo by a food chain based on bacteria that food is not through photosynthesis, but chemical reactions using the heat of volcanoes.