The oceans are a huge ecosystem of the planet, which covers a large area of the Earth. A huge number of animals live in the waters of the oceans: from unicellular microorganisms to huge blue whales. An excellent habitat for all kinds of fauna has developed here, and the water is filled with oxygen. Plankton lives in surface waters. The first ninety meters of depth in the waters are densely populated by different animals. The deeper, the darker the ocean floor, but at the level of thousands of meters under water life boils.
In general, scientists note that the fauna of the oceans is less than 20% studied. Currently, about 1.5 million species of fauna have been identified, but experts suggest that about 25 million species of different creatures live in the waters. All animal divisions are very arbitrary, but they can be approximately divided into groups.
The most abundant class of ocean inhabitants is fish, since there are over 250 thousand of them, and every year scientists discover new species that were previously unknown to anyone. Cartilaginous fish are stingrays and sharks.
Stingrays are tail-shaped, rhomboic, electric, sawfish. In the oceans, Tiger, Tuporylye, Long-winged, Blue, Silk, Reef sharks, Hammerhead sharks, White, Giant, Foxes, Carpet, Whale sharks and others swim.
Whales are the largest representatives of the oceans. They belong to the class of mammals and have three suborders: mustachioed, toothed, and ancient. To date, 79 species of cetaceans are known. The most famous representatives:
Other animals of the ocean
One of the mysterious but beautiful representatives of the fauna of the oceans is corals.
They are miniature animals with limestone skeletons that accumulate to form coral reefs. A rather large group is crustaceans, numbering about 55 thousand species, among which crayfish, spiny lobsters, shrimps and lobsters are found almost everywhere.
Shellfish are invertebrate animals living in their shells. Representatives of this group are octopuses, mussels, crabs.
In the cold waters of the oceans located at the poles, walruses, seals, and fur seals are found.
Turtles live in warm waters. Interesting animals of the oceans are echinoderms - starfish, jellyfish and hedgehogs.
So, in all the oceans of the planet there are a huge number of species, all of them are very diverse and amazing. People have yet to explore this mysterious underwater world of the oceans.