No prizes for guessing how the flamboyant cuttlefish got its name, then! This delightful species actually has surprisingly poor colour vision – but they have got another brilliant visual trick up their many sleeves. Cuttlefish are able to see polarisation; the plane of incoming light. It is even possible that they use this ability, together with their stunning colour-change camouflague, to communicate with each other under the nose of oblivious predators unable to detect the changes!

Image courtesy of Silke Baron under CC BY 2.