Look at this cutie from our fanart The Amazing World of Gumball Darwin Watterson Cute Cheeks Sticker! His full name is Darwin Raglan Caspian Ahab Poseidon Nicodemus Watterson III - he is an orange goldfish with arms and legs. His goldfish-shaped head takes up his entire body, with his fins and legs hanging down. Darwin used to be Gumball's pet, but one day he grew legs and generally adapted to life outside of water - so he was adopted by the Watterson family.