Some dragons (or dragon-like creatures) from the Hokusai Manga (北斎漫画)
I tried to do a little research and I *think* they are:
Top: a Yinglong (應龍) from Chinese mythology
Left: something Hokusai is calling a “rain dragon” (ama-ryuu)
Right: a “da-ryuu”(?); I don’t recognize the first character but the second is 黽 (toad)
Bottom: some sort of snake (蛇) like creature
Anyone know more about them?