We can see economic concepts throughout the episode when Fish learns that he is rich because of a small savings account he opened 1000 years ago. Thanks to interest rates, his money has grown to billions. When Fish and his friends try to order a pizza, he finds out that anchovies no longer exist because of overfishing when humans arrived on the planet. Zoidberg notes that his people killed the anchovies because they always believed one more wouldn’t have an impact.