Fiddler crabs see the polarization of light and this gives them the edge when it comes to spotting potentials threats, such as a rival crab or a predator. Now researchers have begun to unravel how this information is processed within the crab’s brain. The study has discovered that when detecting approaching objects, fiddler crabs separate polarization and brightness information.
Click here for original story, Separate polarization and brightness channels give crabs the edge over predators
Source: ScienceDaily