With distinct tubular eyes and a natural glow, two species of bioluminescent deep-sea fish nicknamed “barreleyes” have been identified. The newly described species are part of the family Opisthoproctidae. Barreleye fish are not well-described, due to the rareness and fragility of specimens, the researchers said. These fish are “one of the most peculiar and unknown fish groups in the deep-sea pelagic realm, with only 19 morphologically disparate species,” the scientists wrote in their new study. However, the scientists were able to determine the two newfound species through comparisons of pigment patterns on the fish’s “sole.” This organ, found along the belly of some bioluminescent species, controls the light emitted from a different, internal organ. These two organs give the fish their glowing MORE