A strange species of fish that lives in deep water called the male eye fish has a transparent head and tubular eyes. Since the discovery of the fish in 1939, biologists have known that its eyes are very sensitive to light. However, the shape of the eyes seems to give the fish a tubular market.
The male ankle has a transparent glass head
Scientists have now discovered that the eyes are rotatable, allowing the fish to see directly or search for an object above through its transparent head.
Macropinna microstoma (Macropinna microstoma) adapts to black habitats of deep seas where light cannot reach. They use extremely sensitive tubular eyes to find the low profile of the prey above its head.
The male microstome Macropinna has extremely light-sensitive eyes that can spin into a shield-shaped part filled with clear liquid on its head. Its tubular eyes lie deep inside the head covered with bright green lenses. The eyes are pointed upward (in the photo) as the fish searches for a food source above their head. His eyes were lowered as he ate. The colon just above the fish’s mouth is not its eyes. In fact, it is an olfactory organ similar to a person’s nostril.
However, scientists once believed that the eyes could only be pointed upwards. This makes the fish unable to see in front of it, and it is also difficult for the fish to catch its lips with its sharp little mouth.
Bruce Robinson and Kim Reisenbichler of the Monterey Bay Aquarium Research Institute used videotapes obtained from remote-controlled cameras to study the male ankle all the way to central California. At a depth of 2,000 to 2,600 feet (600 to 800 m), the camera captured images of these fish almost motionless in the water, their eyes emitting a bright green light under the camera light.
Most current representations and illustrations of this fish do not feature the aforementioned liquid-filled shield, possibly because this fragile structure was destroyed when the fish got caught in the net and brought back to land.
Robinson and Reisenbichler were lucky enough to bring a man alive with his ankle after throwing the net. After a few hours of letting the fish live in the boat’s tank, they were able to confirm that the fish rotated its tubular eyes as it changed the position of its body from horizontal to vertical.
The males, measuring only a few centimeters in length, are believed to eat small fish and jellyfish. The green pigment in their eyes filters light coming directly from the ocean surface, helping the fish to identify the bio-shiny spots of jellyfish or other animals just above their heads. When it detects prey (such as a floating jellyfish), it turns its eyes forward and swims upward.
