Octopus – intellectuals of the deep sea
Octopuses are amazing creatures that are still a mystery to scientists. These creatures have always attracted the attention of scientists-oceanographers their amazing body structure and of unusual mental abilities, it is believed that octopus along with cuttlefish and dolphins are the most intelligent marine species. However, these creatures are remarkable not only for its mental abilities.
Scientists have long noticed that octopuses are the owners of the eyes, is unique not only in structure, but also the relatively long dimensions of the body and visual capabilities. A large brain and large eyes allow the octopus to receive much more information about the world than any other animal on the planet. Octopus eye are still the subject of controversy in the scientific community and not all the details of the vision of the world and these animals clear a learned person, but still some staggering data scientists already have.
Unique features of the octopus eye
First of all, it should be said that the eyes of octopuses are very large and account for about 10% of the total body mass of the animal. In terms of eye size relative to body mass octopuses are the real Champions in miregion. For example, the adult giant octopus is the size of the eyeball is 35-40 see
The anatomy of the octopus eye is very similar to the structure of the human eye. Octopus eye consists of the retina, iris, lens and cornea. The pupil is mobile and able to expand and contract, but focuses the gaze of the octopus due to the curvature of the lens, and its zoom in and out with respect to the retina.
It is believed that these molluscs are able to focus on subjects that are not able to do other marine life. Sensitive retina and the lens of the eye of the octopus perfectly distinguish between colors, even in muddy water. Big size octopus eye also helps him survive in the ocean because due to this structure of the organ of vision the clams are able to see objects even in pitch darkness.
The unique structure of the octopus eye allows him to perceive three-dimensional picture, so these animals are perfectly distinguish the form of objects. Some fans of these cephalopods is believed that the visual organs of an octopus allow him to see in the ultraviolet spectrum of light, but these data have not yet found scientific confirmation.