Connected with dragon, spider and the symbols spiral.

It was also assumed that the symbol of thunder and the phases of the moon also relates to the zodiacal sign of Cancer, with deep water, with the summer solstice, with the ominous gates of hell.

Celts and Scandinavians depicted octopus tentacles straight, but in the Minoan and Mycenaean depictions are spirally curved and acquire symbolic connotations spiral. Octopus often accompanies swastika.