peacock mantis shrimp close-up
Mantis Shrimp are marine crustaceans and are members of the Stomatopoda order. Despite the name they are neither shrimp nor mantids.
They possess hyperspectral colour vision, and their eyes, able to move independently of each other, are considered to be the most complex eyes in the animal kingdom. The "black holes" in their eyes, as seen in the above photo, are pseudopupils.