This majestic creature is a giant cuttlefish (sepia apama) - lovingly dubbed the 'chameleon of the sea'. Using cells known as chromatophores, giant cuttlefish put on spectacular displays, changing colour instantly and raising parts of its skin to change shape and texture to imitate rock, sand or seaweed. 🎥 David Phan #ausgeo #australia #seeaustralia #cuttlefish #underwater #fish #sealife #ocean #beach #wildlife #nature #naturephotography #scuba #reef #diving | Australian Geographic