Perhaps one of the only marine Ultra Machines, UM-06, Codenamed Leviathan, was first spotted during the Cold War, when a submarine was sent on an expeditionary mission for spying on soviet activity. The Captain, named Jeff Powers, was traversing the vast ocean of the Pacific, would stumble upon what would appear to be a strangely shaped floating rock. As the vessel circled around the object, wide, demonic glowing red eyes would peek out, and the ship would suddenly feel swirling tug more powerful than any tidal force previously recorded. Captain Powers ordered his crew to escape full speed, but their attempts would be in vain, and they would send out a distress signal buoy before being sucked in to the mouth of the gargantuan creature, which was without a doubt, the leviathan of many myths from around the world. Many navies would try to capture or destroy the beast, only to suffer the same fate as the expeditionary submarine force. Other sightings of this beast range from The coast of Israel, Santorini, the Philippines, and of course, the legendary Bermuda Triangle.

This massive Ultra Machine is very well known for its vast mouth full of razor sharp teeth, which can suck in water and potential food sources like a giant whirlpool, along with tentacles which can clobber even the most heavily armored of battleships. Aside from its amazing strength, the beast is also surprisingly quite agile, for it has somehow reported to chase flying boats and floatplanes and devour them all the same as larger, bulkier shipping like tankers. Rumor has it that it was this monster that sunk the Titanic, rather than a humble iceberg, and that it was at least partially responsible for the Exxon-Valdez oil spill disaster of 1989.

Instructions:
- AG1+ Throttle to start the engines and gyro
- AG8 (on by default)+ VTOL Down to open the massive jaws
- AG2+VTOL Down to raise the tentacles, and roll to thrash about.
- Last but not least, Yaw and roll both steer, and pitch moves the tail fin up and down