the fish with a transparent head VIDEO


The rare fish tracks its prey with rotating eyes that are extremely sensitive to light, encased in a transparent membrane filled with liquid. The eyes, directed upwards, not in front, help them to follow the prey, wherever they run, or to steal the food of other “neighbors”.

The green tint (which actually comes from a yellow pigment) acts as sunglasses for the strange little fish to help them track their prey. There is nowhere to hide in the open waters of the deep ocean, and many animals that live here have glowing bellies to protect them – bioluminescent prey are hard to spot in the dim, blue sunlight streaming down into the ocean water – but the Barreleye fish is one step ahead.

The barreleye’s tubular eyes are extremely sensitive and capture a lot of light, which is useful in the depths of the ocean, helping it find prey easily. Above the mouth, what appear to be eyes are actually the “nostrils” of the fish.

“It always puzzled me that their eyes were directed upwards. Imagine trying to eat something that is in front of you, while staring at the ceiling,” explains Bruce Robison, a marine biologist at the Monterey Bay Aquarium Research Institute in California, for The Guardian.

The Barreleye fish (Macropinna microstoma) lives in the Atlantic, Pacific and Indian Oceans.

So far, researchers in California have only found dead specimens caught in nets, so they are convinced that the barreleye fish is extremely rare.

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