Researchers at the Monterey Bay Aquarium Research Institute (MBARI) recently made a shocking discovery. No it wasn't some new exotic from the deep that we had previously never seen before. No, this fish has been known since the late 1930's. But until now all the specimens scientist had to look at were mangled and dead.
Well a live specimen was brought up from the deep ocean abyss intact and alive recently and the researchers were amazed at what they discovered.
What they discovered was that the barrel fish has a transparent head. Big deal you say there are lots of other transparent fish with transparent bodies to hide from predators. True... true... but this fish doesn't have a transparent head to hide from predators. Its transparent head which really looks weird on such a large fish servers another purpose entirely. The fish has eyes withing its head that are actually barrel shaped and have the unique ability to rotate within the fishes head. This allows the barreleye fish (Macropinna microstoma) to actually rotate its eyes and look THROUGH h its own head to see in different directions.
Scientist now believe the fish hang motionless at the very edge of light penetration into the deep sea looking upward through their transparent, fluid filled head searching for the faint silhouette of jellyfish and other such creatures. Only when they are eating are positioned to eat do the eyes point forward in the head so they can see what they are eating and maneuver accordingly.
For more pics and even video you can go to the MBARI.org website.