Incredible eye variation
http://smithsonianscience.org/2015/01/bizarre-ocean-amphipod-has-16-retinas-in-each-of-its-very-big-eyes/
Because they live in the dark areas of the ocean, hyperiid amphipods like P. gracilis have evolved some incredible eyes, Osborn points out. “With about 340 known species, hyperiid amphipods have every variation on eye shape that you can imagine and several you would never think of, from no eyes, to eyes that take up nearly half their body, eyes out on long needles, mirrored eyes, to eyes that can see in 360 degrees.” The eyes of P. gracilis—which make up about 45 percent of its body and have their retinas split up—rank among the oddest, the scientists say.
http://smithsonianscience.org/2015/01/bizarre-ocean-amphipod-has-16-retinas-in-each-of-its-very-big-eyes/
Because they live in the dark areas of the ocean, hyperiid amphipods like P. gracilis have evolved some incredible eyes, Osborn points out. “With about 340 known species, hyperiid amphipods have every variation on eye shape that you can imagine and several you would never think of, from no eyes, to eyes that take up nearly half their body, eyes out on long needles, mirrored eyes, to eyes that can see in 360 degrees.” The eyes of P. gracilis—which make up about 45 percent of its body and have their retinas split up—rank among the oddest, the scientists say.
