Mantis shrimp have long been regarded as visual super-stars. They can have up to 16 distinct photoreceptor types that are maximally sensitive to at least 12 different wavelengths (colors) of light; from deep in the ultraviolet, across our visual range, and into the infrared. In addition, they are strongly sensitive to linearly polarized light (LPL) and are able to discriminate the angle at which these waves of light are oscillating as they travel through space. This visual modality, though hugely foreign to us, is actually well perceived by cephalopods, some chordates, and almost universally amongst the arthropods. Mantis shrimp however, seemingly never content to be matched, have taken polarization sensitivity a step beyond any other animal. They have evolved an ingenious means of detecting and discriminating circularly polarized light (CPL)…
Read more at Arthropoda’s new home, on the Southern Fried Science Network. 
That’s very informational piece of writing!
What a truly joy of a read..