In the context of JoJo's Bizarre Adventure: Stardust Crusaders , is the name of the Stand featured in Episode 6 (and chapters 131–134 of the manga). It is an aquatic Stand used by an assassin posing as the real Captain Tennille . Plot Summary: Episode 6

Dark Blue Moon is designed specifically for marine combat and is described as being faster than any sea creature.

For more details on the episode's production and lore, you can visit the JoJo's Bizarre Wiki or read the full story arc summary on JoJo Wiki .