(ORDO NEWS) — Mantis shrimp ( Stomatopoda ), which live at shallow depths in tropical and subtropical seas, have the most complex eyes in the world. If a person can distinguish 3 primary colors, then the mantis cancer is 12. Also, these animals perceive ultraviolet and infrared light and see different types of polarization of light.
Many animals are able to see linear polarization. For example, fish and crustaceans use it to navigate and detect prey. However, only mantis shrimps are able to see both linear polarization, and more rare, circular.
Such eyes enable mantis shrimps to recognize various types of coral, their prey and predators. In addition, during hunting, it is important for the cancer to strike accurately with its pointed, grasping legs, which the eyes also help.
Mantis shrimps are solitary and aggressive sea creatures, although they spend most of their lives hiding in crevices or burrows dug in the ground. They come out only if they need to find a new home or prey. Some species of these crayfish wait for their prey, while others go out in search of it and, having found, pursue and attack.
By the way, sharp, jagged joints on grasping legs help cope with a prey or predator, which can be much larger in size, for mantis shrimps. So, during an attack, a praying mantis cancer makes several quick hits with its own feet, causing serious damage to the victim or killing her.
Some types of mantis crayfish use this technique to cope with mollusks and crab, easily cracking their feet hard carapace or shell. And others prefer fish that they can kill by inflicting only a few serious wounds on it.
Interestingly, some particularly large mantis shrimps can break glass with one or a couple of hits on it. In the video you can see how this happens:
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