Darwin Watterson is a fictional character from the American animated television series The Amazing World of Gumball. He is the adopted brother of Gumball Watterson and a goldfish who gained the ability to walk and talk after a science experiment gone wrong. Darwin is a kind and gentle soul who is always willing to help others. He is also very intelligent and creative, and he often comes up with ingenious solutions to problems. However, he can also be naive and gullible, and he is often tricked by Gumball into doing things that he would not normally do. A fanart The Amazing World of Gumball progress bar for YouTube with Darwin Dance.