Cthulhu is a malevolent entity who hibernates somewhere beneath the ocean in the South Pacific. The imprisoned Cthulhu is the source of constant anxiety for mankind at a subconscious level, and also the subject of worship by a number of human religions.
This abstract octopus tattoo design is an example of one of the ways that a tattoo artist can get creative with the shape of an octopus. Description from pinterest.com. I searched for this on bing.com/images