Macropinna is a genus of ray-finned fish belonging to Opisthoproctidae, the barreleye family. It contains one species, M. microstoma. It is recognized for a highly unusual transparent, fluid-filled shield on its head, through which the lenses of its eyes can be seen.
Scientific name: Macropinna microstoma
Order: Argentiniformes
Higher classification: Macropinna
Rank: Species
Family: Opisthoproctidae