Cube Octopus (キューブオクトパス, Kyūbu Okutopasu; sometimes listed as Cube Tako) is a Cube Animal from Doubutsu Sentai Zyuohger, the 40th Super Sentai series, broadcast in 2016. The Zyuohger summon their mecha as cube-shaped Zyuoh Cubes that unfold from a compact block into an animal form via a "Cube Change." Cube Octopus is not part of the show's core mecha roster but belongs to the additional weapon-class Cube Animals, serving as armament and an auxiliary mecha for the main robot, Zyuoh King. Because Zyuohger was never adapted into a Power Rangers season, Cube Octopus was released only in Japan; no Hasbro or US counterpart exists (the "Power Rangers Zyuohger" wording seen in some marketplace listings is seller shorthand, not an official US release).

In animal mode, eight legs fold out of the cube to form the octopus. The head houses a wind-up (zenmai) mechanism that spins the tentacles. For combination, the octopus head splits apart: the detached head becomes the robot's new head, while the body and legs mount onto its back, producing the armed configuration known as Zyuoh King Octopus.

The DX toy was made by Bandai Japan and released in 2016 under the Big Zyuoh Cube Weapon / Chou Doubutsu Busou (超動物武装) line. Unlike the smaller, candy-toy-sized Cube Weapons (Crocodile, Wolf, Rhinoceros), Cube Octopus is a "big" Cube Weapon, roughly the size of a standard Zyuoh Cube, which is why it carries the DX designation. As with the entire Zyuoh Cube line, it is made mainly of plastic (ABS/PVC) with no significant die-cast content. Its features are the cube-to-animal transformation, the wind-up tentacle rotation, and the ability to dock onto the separately sold DX Zyuoh King.