Octopuses (yes, that is the correct plural) have only one kind of color receptor in their eye which means they should be colorblind, but they can change the shape of their eyeball to bring different wavelengths of light into focus so they can see color. They have blue blood, three hearts, eight legs, and 2,000 individually moving suction cups that can each feel, taste, and smell.
Octopuses truly are so weird!