Original post here. This image was researched by Bacchus at ErosBlog as part of the “Γ commission.” It was originally published at Hedonix as “Γ 015 – Octopus Rider.” Here is Bacchus’s research:
This artwork is Twisted by artist retroroxi on DeviantArt. According to the artist it is a three-part collage inspired by the famous Hokusai painting as well as an octopus painting by Sorayama (both of which can be seen here.)