Benthalbella Lagiacrusichthys [1] Rosenblattichthys Scopelarchoides Scopelarchus The pearleyes are a family, Scopelarchidae, of aulopiform ray-finned fish, distinguished by their unique visual system, with two retinas in each eye.

They have a similar appearance to lizardfishes, with a large mouth, numerous teeth, and a forked tail.

However, unlike any other fishes, their eyes also possess a "pearl organ"; a white spot on the surface of the eye that may help to pick up light from the side of the fish, out of the normal visual field.

The pearl organ is associated with a secondary retina, allowing the fish an unusually wide field of view.

[4] Pearleyes typically live between 500 and 1,000 m (1,600 and 3,300 ft), although some species may visit shallower waters during the night.