The Hoopla Fish is a very small, green fish that wears a purple shirt and indigo pants. He opened his mouth widely when he yelled "Hoopla."
The Hoopla Fish continually interrupted the narrator every time he was going to say, "Sounds like a lot of hoopla to make over a little Krabby Patty, right?" After the Hoopla Fish shouted and cut off the narrator too many times, he got hit with a brick.
In the Spanish version he says "Hurra!" which means "Hooray!" This is a reference to a German punk song by Die Ärzte from the 90's.