Ocean Octorok

Ocean Octoroks are a type of Octorok. As their name suggests, they are solely found in the sea. They are based off the sea-living iteration of Octoroks from The Legend of Zelda: The Wind Waker, though are in games where normal Octoroks are land-based. Like the versions from The Wind Waker, they are quite large, appearing at a comparable size to the player's vehicle.

The Legend of Zelda: Phantom Hourglass
In The Legend of Zelda: Phantom Hourglass, Ocean Octoroks are a common enemy in the segments aboard Linebeck's ship, appearing in all four seas in some respective portion. They have a pink body and a yellow shell on their back with a purple swirl design on it. They surface before slowly circling the ship, occasionally submerging to be safe from the cannon. If left alone for long enough, they will attack the ship by ramming it.

The Legend of Zelda: Spirit Tracks
In The Legend of Zelda: Spirit Tracks, Ocean Octoroks are limited to the Ocean Realm, where they are only found in the underwater series of tracks. This time, they have an orange body and pinwheel-like symbol on their mantles. They tend to move in a circular pattern due to no longer being limited to horizontal movement. They are also more durable, taking three cannon shots to defeat. If left alone for long enough, they swim up close to the spirit train and hit it with their two larger arms, covering the screen with ink. When this happens, the player needs to horizontally rub the screen to clear it, but it takes a few moments for it to work. Upon defeat, they always give a red Rupee.