Tubular muscular organ, conical at its opening at the dorsal mantle cavity; the octopus discharges water through it to move quickly and to oxygenate itself.
mantle
Thick fold of tissue enveloping the body of the octopus and secreting the shell, which is hidden inside.
eye
Developed organ of sight used to make out light intensity, motion, shapes and certain colors.
tentacle
Long powerful muscular appendage located around the mouth and used for locomotion and grasping.
sucker
Adhesive disk surrounded by a flexible ring located on the ventral surface of the tentacle and used for suction and anchoring.
