M is for Mantis shrimp
Mantis shrimp are colourful and awesome. They are between around 10cm and 40cm in length and are famous because the variety with calcified clubs (smashers) can punch with such force they smash aquarium glass. Other varieties have spear claws (spearers) to catch their prey. Both these types can strike with speeds of around 50 miles per hour from a standing start with super fast acceleration. The smashers do this in order to break into prey with shells while the spearers hunt soft bodied fish.
Mantis shrimp have the the most complex eyes ever discovered with at least 4 times the types of photoreceptors humans possess and the ability to tune their colour vision to adapt to their environment. They are compound eyes on stalks and can see from deep ultraviolet to far red and polarised light.
This mantis shrimp is a particularly colourful variety known as the peacock mantis.