GlassGlobeFlower

Octopi (belonging to the class Cephalapoda) have the ability to change colour. It is generally assumed that they do this for camouflage underwater or to make them appear less palatable to predators but this is in fact only part of the story. Octopi are molluscs - they diverged from our own evolutionary line 700 million years ago and are related to the Escargot family (snails). Since they have no backbone they are not classified as vertebrates. However, Octupi are considered a wonderful example of parallel evolution because their optical system is very similar to the mammalian optical system. The reason for this is thought to be that they evo