Darwin Watterson is a fictional character from the animated television series The Amazing World of Gumball. He is a goldfish who was adopted by the Watterson family and has the ability to walk and talk like a human. Darwin is known for his cheerful personality and loyalty to his family and friends. In the show, Darwin often serves as a voice of reason and provides emotional support to his brother, Gumball Watterson. He is characterized by his innocence and optimism, which often leads to humorous situations. Darwin's unique perspective on life adds depth to the show's themes of friendship and family.