From John Carter of Mars:
From Futurama:
From King of the Hill:
From Disney's Fantasia:
From Jim Henson's The Dark Crystal:
From Calvin and Hobbes:
From Wander Over Yonder:
From Invader Zim:
From Star vs. the Forces of Evil:
From... well, Japan?
From Dr. Seuss:
From Beauty and the Beast:
From Disney's Alice in Wonderland:
From Atari:
From, well, obviously.
From Mystery Science Theater 3000:
The term for an octopus mermaid is "Cecaelia":
His name is Gourdon:
Spiders!
Sometimes I make freehand creatures that I call Scrumbles:
Dragons!
The name Cerberus may mean "spotted," so I did a different take on him. So many renderings of him are of a jet-black monster-dog. I thought Hades needed a cuter, spotted puppy:
Dungeons and Dragons: