This beautiful juvenile octopus is just 2 centimetres (an inch) wide. It was spotted at night in the deep water off the coast of Tahiti by Fabien Michenet, France, for the “Wildlife Photographer of the Year 2015″ contest.
Its transparent body lets us admire its internal organs. Notice also the orange spots on its tentacles: that’s its chromatophores, i.e. the colour-changing cells used for camouflage.