Zantraan

The Zantraan were a race of large, grey, three-eyed, six tentacled-limbed creatures, ruled over by a Queen. They were in fact a host body. They were forced to leave their home planet when it was ravaged by a plague. The surviving population fled in a ship to find a new world. Finding the Earth undesirable, they repaired their ship and returned home, where the plague should have died out. (COMIC: Sting of the Serpent, Attack of the Rats, The Zantraan Invasion)