Life in the deep sea
The sea always attracted people to him, maybe even more than the sky. The world ocean is the habitat of a huge number of plants, fishes, sea animals, including mammals. There are several zones of ocean life. Most inhabited the upper water column, down to 300 meters, as this is the most illuminated part.Area at a depth of from 300 to 1000 metres is the name of the region of penumbra. At a depth of over 1000 meters there is an absolute darkness and intense cold, there are no plants.
The pressure at great depths is very high, at a depth of 3800 m, the pressure is 400 kg cm3 and at a depth of 10900 m – already 7250 kg cm3. The denizens of the deep in different ways have adapted to these difficult conditions. The only food source of deep-sea animals – the corpses of the inhabitants of the upper part of the ocean and bacteria.Their eyes are either absent or reach a high degree of development they are sometimes of enormous size, are often placed on the lateral appendages of the stems or telescoping, is provided with a lens system. So, the eyes of the coelacanth fish have a cylindrical shape, this allows it to see distant objects.
The mouth of this fish is facing up, as she swallows the food that falls from upper layers of the ocean. Alternative title: – fish-axe,as a special form of her silvery body resembles an axe.The blind forms to raziskovanja production has a special long appendages of the body – sensitive tentacles. Many organisms have complex organs glow, which attracts prey.
For example, fish-vipers in the mouth and on the body there are glowing dots, which act as bait. This name fish-the Viper owes its long needle-like teeth and snake-like body. When attacking prey, it opens wide the jaws, and the front similar to the spear tooth striking the victim.During the day fish the Viper inhabits at great depths of 1000 – 2800 m, and at night rises to the surface to a depth of only 50 m. the Greatest depth at which it was discovered the fish – m. This is a special flat fish – sole. Dominant among deep-sea animals are primarily echinoderms, crustaceans and then from parts of the fish Deep-sea fauna for the study is extracted using trapping devices and trawls, launchable from a ship as traps on a steel cable.
Don’t know if there’s something more interesting than the study of the deep sea, because even now not only most of the mysteries of the ocean remain a mystery for men, but not in all parts of the ocean visited the people.
Every year scientists discover new species of hitherto unknown animals and plants.