Octoboss

He looks like a humanoid octopus, red-eyed and hairless, with tentacles curling out from his arms. Two traits set him apart from ordinary Squidmen: his bulk, which dwarfs the usual size of the species, and his coloring, a pink hue in place of their typical dark cyan. Metal leg supports lend him mobility, and an arm-mounted cannon lets him strike harder.

Beyond his native tongue he has picked up some English, though he wields it clumsily and apologizes for his broken grammar. Long ago he took up a criminal life, trading on his size and strength to throw his weight around.

Almost nothing of his past is on record. What stands out is that he came into the world with pink skin rather than his species' usual shade and grew well beyond the normal Squidman size. Somewhere along the way he turned to crime and made a name as the villain Octoboss.

He appears leading a band of Squidmen in a raid on a plant holding highly radioactive material, where Rex Splode confronts him. Their fight tilts in Octoboss's favor thanks to his power and the fact that Rex is still mending from an earlier wound. Invincible then arrives to back Rex up, and in the end Rex puts Octoboss down using his newly fitted arm implant.

His amphibious makeup would let him move between water and land with little strain, and his size and mutations grant strength enough to heave conveyor belts and metal crates. He is durable as well, shrugging off repeated blows from Invincible and weathering the blasts Rex hurls at him.