He is a light green fish who wears a light brown shirt, a white undershirt, a light brown hat with a dark brown stripe, a brown belt with a golden buckle, and a gray whistle around his neck.
Role in episode
He first appears at the beginning of the episode when SpongeBob and Patrick go Jellyfishing. He opens Jellyfish Fields in morning and asks SpongeBob and Patrick for their Jellyfishing licenses. They both show the ranger their licenses and they enter Jellyfish Fields, knocking over the "open" sign next to the ranger.
At the end of the episode, when SpongeBob and his friends are signing, the ranger sings the final line of the song: "Everyone sing along" and turns the "closed" sign to "open."