The Sea Cucumber Ball is a legendary food that Rolf's Great Nano made. Rolf has always made these every year as a tradition to remind him of his Great Nano's battle with a giant sea cucumber. In the episode "Dueling Eds," Rolf was having a traditional party and was offering sea cucumbers as food to the other kids. When Eddy was offered one of the sea cucumbers by Rolf, he threw it into a fence (he was trying to throw it through a knothole that was on the fence, but it missed). Insulted by Eddy's actions, Rolf became depressed for the rest of the day after Eddy disrespected his food and traditions. He then let everyone trample on his face as they leave. There also is such thing as a Sea Cucumber. Rolf also claimed that these sea cucumber balls are good for the "digestive spout."
- A sea cucumber jawbreaker appears in Ed, Edd n Eddy - The Mis-Edventures with the description saying "The Great Nano would approve!"