Common cuttlefish - Sepia officinalis Cephalopod mollusc belonging to the Decapod order, oval-shaped with a well developed head, to which are attached 8 arms and 2 extendible tentacles. Well-developed shell hidden inside the mantle. Variable colouring due to its exceptional mimetic talents. Found close to sandy or detrital beds, from a few meters depth to over 100 meters. Maximum size 35-40 cm.