Mantis shrimp tune their ultraviolet vision using biological sunscreens

Mantis shrimp tune the sensitivity of their ultraviolet photoreceptors using a unique application of filter pigments in the optical components in certain facets of their eyes. By combining four ultraviolet filters with two visual pigments in the photoreceptors, mantis shrimp achieve six ultraviolet spectral sensitivities - the most described in any animal. Surprisingly, these filters are composed of biological sunscreens, typically