[Finn]

Actually, the big purple octopus IS Hastur. The King in Yellow is just one of Hasturs avatars. The god/thing itself likes to spend its time doing pretty much what Cthulhu is, sleeping in a large body of water. Luckily, however, the body of water Hastur resides in is somewhere near the star Aldebaran. I got this information from the CoC Core rulebook for, i think, 6th edition.