Flies have 5 eyes! Two of these being compound eyes consisting
of many lenses. The other three (ocelli) are single lens eyes
located in a triangle form above and in between the two compound
eyes, on the top of the head.
Crayfish have compound eyes, similar to many insects. These eyes
are on stalks on the top of their head and allows them to see what
is going on above them when they are in the bottom of a body of