MarineDevimon is a Dark Spawn lord of the sea that joined Malefor's ranks in order to cash in on the Dark Spawn induction craze that was going on the demon world at the time. It is an aquatic dirty fighter that even Devimon hates to fight, due to its brutal reputation, and though it is a subspecies of Devimon, it completely lacks all emotions but hatred due to its lonely life in the profound ocean depths. For that reason, to ensure that it wins by any means, it won't let up with its attacks even if the opponent loses their fighting spirit. The two big tentacles growing from its back appear large and special, but they each possess their own will, so they will struggle for the catch and act without permission.
MarineDevimon was a member of the Daemon Corps that served the Dark Lord Daemon. He first appeared on December 26, in the waters of Tokyo Bay, to menace a cruise ship on which a wedding was taking place. T.K. helped the ship’s passengers get to safety, as Cody, Submarimon and Angemon battled MarineDevimon. When Ikkakumon arrived and Digivolved into Zudomon, MarineDevimon used his arms to shield himself from the Vulcan's Hammer. He then submerged and used his ink to cloak his escape, for fear of having to deal with three Digimon at once.
MarineDevimon reared his head again by nightfall on Daemon's order to take Ken from Yukio Oikawa but he had Shakkoumon to deal with. As the two behemoths fought by a hospital, T.K., Cody and Joe's brother went in and helped evacuate the patients. When one of MarineDevimon’s tentacles smashed through the wall, Cody screamed and Shakkoumon used his Justice Beam attack, which completely obliterated the demon.
Role in the series
MarineDevimon has been resurrected by Daemon to serve as one of the Dark Spawn elite corps.