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Macropinna microstoma

Macropinna microstoma – a medium-sized deep-sea fish known for its transparent head through which she sees the eyes that are located within soft tissues of the head. Inhabits the cool waters of the Arctic and the Pacific, at a depth of over 500 meters.

For the first time this fish has shown to the public quite recently, only in 2004, then received the photos Macropinna microstoma. Prior to this, the interest in fish was shown only zoologists who speculated about how this fish, with such strange visual mechanism able to see at a great depth in almost complete darkness. Yes, and whether at all. As we already know, by the example of other deep-sea fish, sight at this depth is not of great importance.

Fish with transparent polovogo this time scientists could not explain why this fish needs such uncharacteristic fauna structure of the visual system. Only the experiments in specialized aquariums that simulate deep-water habitat Macropinna microstoma, has allowed to establish that the eyes of these fish are quite sensitive to the dim light that penetrates to such great depths. Animal eye contain specific yellow pigment that gives them their green color. Suggest that this pigment is responsible for the best perception of light, reducing its brightness and allowing the fish to distinguish bioluminescence authorities of other deep-sea creatures that feed the Macropinna microstoma.

It was believed that the fish can only look up. Among caught and brought to the surface the fish eyes did not have devices responsible for their rotation. Therefore, scientists assumed that the eyes, and if you play any role during hunting animal, not so important. In the stomachs of those fish that were in the hands of scientists-zoologists, were found in a large number of zooplankton, and small crustaceans. Hence the conclusion suggests that the main diet Macropinna microstoma is the so-called “heavenly trash” – organic matter from the upper layers of water falling to the sea floor.

Actually this fish is the most common predator with an unusual head structure. Her mouth decent size, however, the oral aperture is small. It then limits the size of prey, not allowing them to grab large fish and crustaceans. Mouth Macropinna microstoma does not have many teeth, so it’s hard to keep caught prey.

While hunting fish floating in the water on their large fins, her eyes directed upwards. Noticing the presence of food, it swims under its victim and changes his body position from horizontal to vertical. Standing up his head, Macropinna microstoma eat shrimp or small fish, which is unaware that she is being watched from below.

Fish with transparent head

How is it that Macropinna microstoma does not lose sight of his victim, standing “by a pillar”? It’s all thanks to her unique eyes. The fact is that they are depressions filled with a special liquid. This fluid inside the eye can turn, but they always look up. So the fish and learned how to change the position of the body under a certain angle, and turning upwards, it looks right, relative to the direction of its movement.

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