The Octopus-Men of the planet Neptune are unique to the Earth-5106 universe where the planet Neptune is capable of sustaining life. They were the natural predators of the Fish-Men of Neptune. They were referred to as "vampires", likely due to the fact that they consumed blood. The Octopus-Men vanished beneath the surface of their planet at an undisclosed time under unknown circumstances and were believed to be extinct. However in the year 2000 an underwater volcano erupted, freeing the Octopus-Men and unleashing them upon the Neptunians. The creatures were wiped out by the Space Squadron peacekeeping force. Later another group of Octopus Men were uncovered when Space Squadron's Jet Dixon, Mxxptrm and Rusty Blake were inadvertently teleported into their cavern while testing out a new chemical, they briefly clashed with the creatures before being teleported away.
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