Maybe it was just playing a primitive form of Dominoes with another of it's kind, in the lair beneath the sea? :-)
Right. That's better. Thanks. It was a colossal tentacled horror vested with a fell intelligence and a drive to improve its competitive reasoning through strategic gaming. I'm going to sleep much better now.
Maybe it was playing strip-dominoes with a nubile young thing-a-Cthulhu? :-)