Martin Olson (born April 2, 1952) is a SpongeBob SquarePants crew member who played The Chief in the episode "Mermaid Man and Barnacle Boy V." He also sings the song You're Old on the radio in "Mid-Life Crustacean."
He has appeared in several movies. As far as animated television shows go, his most famous role is Hunson Abadeer in Adventure Time. For Rocko's Modern Life, Olson was one of the original staff writers through all four seasons, writing many of the weirder Rocko's Modern Life episodes. He is also the father of Olivia Olson, who plays roles in animated television shows, but also sings professionally.