Octonaught, also spelled Octo-Naught, is an object that appears in the Sonic the Comic series published by Fleetway Editions. It is an octopus-shaped sea craft controlled by Captain Claw. Claw uses the Octonaught to patrol the waters of the Mobian Channel.
The Octonaught resembles a giant octopus with eight metallic tentacles. These tentacles can be used to attack foes, either as limbs attached to the ship or detached as autonomous badnik sea snakes that can strike or drown enemies. The Octonaught is also equipped with an automatic gun that can fire at any angle. The hull of the ship is electrified.
When Knuckles the Echidna attempted to cross the Mobian Channel in a small sailboat, he was attacked by the eight detached tentacles of the Octonaught. The tentacles destroyed his boat, but Knuckles managed to fend them off until Captain Claw arrived in the main body of the Octonaught. Claw combined his craft with the tentacles, hoping to defeat Knuckles so that he could hand him over to Doctor Robotnik for a reward.
Knuckles attempted to dodge the Octonaught's weapons by hiding on a circle of large stone stacks in the ocean but Claw used the gun to bring down these formations one-by-one. When Claw shot down the last platform, it landed on top of the Octonaught, crushing it and rendering it unusable. Claw admitted defeat and Knuckles forced him to row them both back to land, using the body of the Octonaught as a flotation device.