Dellinger is a 16-year-old boy with blond, slicked-back hair that falls slightly to his shoulders. He wears silver earrings and a cap shaped like a Fighting Fish. He is dressed in a green sweater with swamp-colored spots, like a giraffe, and thin green lines between them. He has a slightly effeminate appearance as he wears short blue shorts and high heeled burgundy shoes. As a half-fishman of the Fighting Fish, Dellinger has bull horns on his head and a flipper on his back.