Tuesday, May 13, 2014

Macropinna Microstoma: Weird Fish with Transparent Head


This bizarre deep-water fish called the Barreleye or Macropinna Microstoma has a transparent head and tubular eyes. It has extremely light-sensitive eyes that can rotate within his transparent, fluid-filled shield on its head, while the fish̢۪s tubular eyes, well inside the head, are capped by bright green lenses.

The eyes point upward when the fish is looking for food overhead. They point forward when the fish is feeding. The two spots above the fish̢۪s mouth are not eyes: those are olfactory organs called nares, which are analogous to human nostrils.

photo: MBARI