An exotic fish live in deep water called the empty eye fish have a transparent head and tubular eyes. Since this species was discovered in 1939, biologists have learned that its eyes are sensitive to light. However the shape of the eyes, appear to have fish with tubular market.
Currently, scientists have discovered that the eyes can rotate, allowing fish or looking directly above objects through its transparent head.
Empty eye fish (Macropinna microstoma) adapted to the dark environment of the deep sea, where sunlight does not reach. They use ultra-sensitive tubular eyes to search for the faint silhouettes of prey over its head.
Empty eye fish Macropinna microstoma has extremely light-sensitive eyes can rotate in a shield parts filled with liquid during over its head. Its tubular eyes deep within the head is covered by the lens bright green. Eyes upward when the fish seek food resources on its head. Eyes downward when it is eaten. Two points immediately on the fish's mouth is not its eye. In fact that's olfactory organs similar to human nostrils so.
However, scientists have thought that eyes could only upwards. This makes the fish could not see in front of it, and also very difficult for them to capture prey with their pointed small mouth.
Bruce Robison and Kim Reisenbichler of the Monterey Bay Aquarium Research Institute have used Data tapes obtained from camera remote control to study Empty eye fish in central California. At a depth of 2,000 to 2,600 feet (600 to 800 m), the camera records images these fish hanging motionless in the water, their eyes glowing vivid green in the light of the camera .
Most of the detailed descriptions and illustrations of this fish is currently not shown shield parts filled with liquid, probably because this fragile structure was destroyed when the fish caught in the net and taken ashore.
Robinson and Reisenbichler lucky to help an empty eye fish ashore alive after casting a net. After a few hours to live fish in tanks on the boat, they were able to confirm that the fish rotated its tubular eyes as it turned its body from a horizontal to a vertical position.
Empty eye fish only a few inches long been thought to eat small fish and jellyfish. Green pigment in their eyes may filter out sunlight coming directly from the sea, help it to determine the biological point of glowing jellyfish or other animals directly overhead it. When it discovers prey (such as a jellyfish is drifting ), it will turn the eyes forward and swims upward.
The findings are published in the journal Copeia.
G2V Star (LiveScience)
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