The hoopla fish is a very small, light green fish who wears a light purple shirt and indigo footsies and has dark green fins. He can open his mouth to be of large diameter. His only spoken line was "Hoopla!."
The hoopla fish continually interrupts the narrator of the "Krusty Krab Training Video" every time he is going to say "Sounds like a lot of hoopla to make over a little Krabby Patty, right?" After the hoopla fish shouts and cuts off the narrator far too many times, he gets hit with a brick.
In the Spanish version, he says "Hurra!," which translates to "Hooray!" in English.