He is a light olive-green fish with a light gray mustache and beard. He wears blue overalls, a checkered red shirt, brown shoes, and a brown hat.
Role in episodes
"Born to Be Wild"
He is seen jumping out and warning SpongeBob about the Wild Ones when he hears their name being said.
"The Fish Bowl"
When Sandy says "Eureka!," the prospector is shown searching for gold and says "Hey, that's my line!," and when Sandy says "Double eureka!," the prospector and a smaller prospector say "That’s our line!"