In Hawaiian mythology the most important deity was the beneficent creator god Kāne, the deity of the sun, the dawn, and the fertile forests where people liked to dwell. Yet there was also a deity in opposition to Kāne—an evil god of the dark depths of the ocean, and darkness, and the death of all things. This underworld deity was known as Kanaloa and was sometimes envisioned as a black, poisonous squid or octopus.
The Hawaiian myth of creation involves an art contest of sorts between Kāne and Kanaloa: both deities carved human beings out of basalt but only Kane’s man and woman came to life. Kanaloa’s people remained dark stone. In anger, Kanaloa seduced the first man’s wife and brought enmity between the sexes. The dark deity then invented poison and thus caused many fish, plants, and animals to be injurious to the new humans. Still not satisfied he crafted death so that men and women would have only a short time in the world.
Because of his mischief, Kanaloa was banished to the depths of the ocean, but he retained his power and godhood. Sailors and fishermen pray to Kanaloa so as to remain safe when crossing his watery domain. Likewise he is worshipped as the foremost god of magic. I wish I had some good stories about Kanaloa doing interesting things while in his octopus form, but sadly stories of the dark god are rare. Some ethnologists even suggest that his role was altered and stories about the deity were changed so that he would fit more coherently into missionaries’ stories about God and the Devil.