The Bogus Business Bureau agents are very large and muscular fish that wear full body suits that are mainly black in color. Their shirts also have the words "BBB" on the front of them which is obviously short for "Bogus Business Bureau."
Role in episode
After Plankton calls the Bogus Business Bureau after Mr. Krabs doesn't allow him to particpate in his contest for a free Krabby Patty, the agents storm through the roof of the Krusty Krab. One of the agents lands through a table in front of SpongeBob, Mr. Krabs, and Squidward while the other lands directly on top of Squidward sending him through the floor. Very shortly after, their boss, Agent Twirp, appears to take action and the agents are not seen again after this.