Fiskerton Saturday is one of the main protagonists of The Secret Saturdays, a Lemurian, and he is the adoptive son of Drew and Doc Saturday as well as Zak's older adoptive brother.

Fiskerton is an eight-foot-tall "gorilla-cat" with tawny fur that gets lighter around his neck, face, hands, and feet. He has red eyes and a mouth full of sharp teeth.

Despite these features, he's so easy-going that Fiskerton looks relatively harmless. He only appears threatening when he's angry.