Mantis shrimp's super colour vision debunked

@article{Morrison2014MantisSS,
  title={Mantis shrimp's super colour vision debunked},
  author={Jessica M. Morrison},
  journal={Nature},
  year={2014}
}
One of the animal kingdom’s most complex eyes is really quite simple. 
Multiband Polarization Imaging
TLDR
This paper presents the concept and recent advances of multiband polarized imaging techniques, in particular, a bioinspired multiband polarization vision system that demonstrates a potential in the recognition of targets in challenging operating environments such as low-contrast and hazy conditions.

References

A Different Form of Color Vision in Mantis Shrimp
TLDR
Stomatopods appear to use a color identification approach that results from a temporal scan of an object across the 12 photoreceptor sensitivities, allowing for extremely rapid color recognition without the need to discriminate between wavelengths within a spectrum.