How fish breathes?
Hundreds of thousands of years ago, long before the appearance on Earth of man, the oceans already swam fish. At that time they were the most highly developed creatures. Since…

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An aquarium of 50 liters
Aquarium (lat. aquarium ) — transparent container for permanent keeping of aquatic organisms. It typically refers to a home aquarium (room) aquarium for keeping fish aquarium in home; for technical…

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Breeding fish in artificial reservoirs
Such fish as carp and tench in the main lead independent lives and inhabit deep waters, in stagnant water, away from other fish. White and motley silver carp are quite…

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The mantis shrimp

Males shrimp-mantis have a very bright appearance. In the eyes dazzled by such a variety of colors. In addition, these shrimp have a unique vision that allows them see objects in almost all wavelength ranges. And yet, they have the most complicated structure of eyes among all animals of our planet.

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
The habitat of this beautiful crustacean is the area of the Barrier reef in Australia. They are found at a depth of 40 meters.

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
Live in sandy burrows or coral fragments

Live shrimp in homemade sandy burrows or in the coral rubble. The length of these burrows can reach 1 meter, and depth up to 40 centimeters. To strengthen, its walls shrimps covered with pieces of shells and coral particles.

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
Males have a bright color

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
Bright color boast male. They shimmer all the colors of the rainbow. The body of them – bright green, his head blue, the front legs and antennae are bright red or orange. Females are not as colorful. Most often they have brown or olive color.

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
Females are more calm color

These shrimp can reach 30 cm. The body is elongated and tapered.

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
The name “praying mantis”, they attributed the ability to instantly throw out their forelegs. The same method the insect uses while protecting from enemies or obtain food.

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
According to the biologist Roy Caldwell, a blow from the mantis takes only 100 milliseconds, which is comparable with one blink of the eyes. The impact of shrimp-mantis 50 times faster!!! This is the fastest movement of that animal.

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
Their terrible weapon is the second pair of nogocheljusti, which are covered with razor-sharp, spines. They mercilessly pierce the body of the victim blow by blow. This leaves her no chance of staying alive. Why shrimp mantis fight is also called crawfish, crayfish-terrorists or fighters. In this way they are protected from enemies, which are many, and catch a prey.

Our fighters prefer to feast on fish, other shrimps, cuttlefish, marine polychaete worms, and molluscs and crustaceans.

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
Carry out rapid attacks helps them expandable tail that throws them forward like a catapult.

But the most surprising in this animal are its eyes. They have a spherical shape and divided in the center parallel lines. But the main thing is that they are able to perceive and to convert the polarized light, which humans cannot do. They see not only linear polarized light, but also light, polarized in a circle. And can transform the first into the second, and Vice versa. To better understand what was happening, have a look here.

The mantis shrimp Peacock or cancer-mantis (lat. Odontodactylus scyllarus) (eng. Mantis shrimp)
Spherical eyes with parallel lines

In addition, shrimp is able to see in the optical, infrared and ultraviolet ranges of the spectrum. This helps them to detect fluorescent labels on other shrimp as a warning of danger or as a threat from each other.

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