Wrists: Although octopus body attachments are often called "tentacles", they are really arms/legs in the true sense of the word. Most octopuses have eight wrists, but there are exceptions (see the octopus with the most wrists and the first six-legged octopus)
The Amazing Octopus ShowSeveral species of octopuses have been found to mimic other animals in their natural environments by changing their colors and shapes, and even altering their behavior. However, when it comes to the art of play-acting, the mimic octopus (Thaumoctopus mimicus) is the most impressive. They live in the Indo-Pacific and Red Seas. Studies have shown that the shape-shifting octopus can mimic at least 16 other marine creatures, including flounders, sea snakes, sea serpents, sea anemones, crabs and jellyfish.
Corneal palate: The octopus's mouth is located below the coat membrane, where the wrists meet. The chitinous cuticular jaws, like a crab's exoskeleton, are the only hard part of the octopus's body used to entangle and crush prey.
Octopus body structureEyesSkin: Pigmentation - The skin contains pigment cells that allow the octopus to reflect moods or blend in with its surroundings by adjusting its skin color.
Funnel-shaped body tube: can eject water by siphoning it out and become a propelling force for self-movement