Rob Koi is one of the head ad executives of Grouper, Goby & Koi, who appears in the episode "Goodbye, Krabby Patty?."
He is light tan with an orange dorsal fin, and has black hair. He wears a dark blue suit and pants with a purple tie.
He is one of the ad executives who agrees that "old is gross" and rejects the slogan SpongeBob
comes up with.