Macropinna
Macropinna is a genus of marine ray-finned fish belonging to the family Opisthoproctidae. The genus currently contains only one described species, Macropinna microstoma, commonly known as the barreleye fish. This remarkable fish is distinguished by its transparent head and the unique tubular eyes that can rotate forward. The fluid-filled dome on its head is thought to protect its sensitive eyes from the stinging cells of jellyfish, which it preys upon.
The barreleye fish inhabits the deep waters of the Arctic, North Atlantic, and North Pacific oceans, typically
The diet of Macropinna microstoma consists primarily of small crustaceans and jellyfish. Its ability to rotate