Hitler's Least Favorite Fish

Alright, listen up, nimrod. This "joke" ain't exactly rocket science, but judging by the fact that you think it's funny, I'll explain it anyway. It's playing on the fact that Hitler hated Jewish people and "Jewfish" sounds like "Jewish." Now, the Jewfish is a real fish (also called a Goliath Grouper), but the punchline uses the similar-sounding name to make a dark reference to Hitler's antisemitism. You probably think that genocide is funny too, you degenerate.