Meet Barreleye, the fish with transparent head
Viewed from the front, the Barreleye fish seems to be completely normal, but when you look at it from the side or from above, you can see that this fish really has eyes in the back of its head.
During its evolution, the Macropinna microstoma has developed so its head is transparent and its eyes are able to move inside its own head to look out in different directions. While its body is mostly dark, the top part of its head is transparent, and its eyes are clearly visible.
The fish, which is only a few inches long, lives a great depths just below the line to which sunlight can penetrate the water.
This means that creatures around it cannot see it clearly. Predators lurking above it cannot spot it either, but it can look upwards to hunt for the small fish and plankton it lives on. Scroll down and meet this amazing transparent fish that seems almost unreal.