User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4902593-20130609051615

For your information, there is a giant turtle in Greek Mythology. It used to belong to a robber named Sciron who tossed travellers from a cliff into the sea to feed the monster. Theseus tricked Sciron and tossed him from the cliff into the giant turtle. My Guess: its the same turtle in the House of Hades art.