Walden is a half shark-half siren but mainly a siren with shark attributes and he has yellow-ish skin with some scars littered on his body, and six fins: four fins on the side of his shark tail, one on the back of his shark tail, and one at the end of his shark tail and he has a long grey shark tail with a white underbelly instead of legs since he's part siren and he has long fluffy royal blue hair that is in a pompadour except for the back since he has quite long hair