As Flash and his friends are enjoying their little vacation, the cruise stops by Coral Island, which the group has to save from familiar foes.
- Cool, Clear Water: The water pools at Coral Island are completely clean and safe to drink. This gets Discussed by the characters, in which Fancy Pants states that multiple theories have been formulated to explain the phenomenon. Some believe the corals on the island are connected to a hidden underground spring, while others theorize that the coral absorbs the salt and thus makes the water clean.
- Evil Poacher: Big Score, Rickashay, and Boulder are at Coral Island to steal its coral, which are protected by environmental protection laws and worth far more than gold.
- Green Aesop: This chapter discusses the delicate balance found in natural environments and how illegal poaching can harm it, which is showcased by how the robot Kingler's excavation of the coral below would've destroyed the island if it wasn't stopped by Flash and his allies.
- Humongous Mecha: Big Score, Rickashay, and Boulder excavate the valuable coral below the island by using a massive robot modeled after a Kingler
- Mr. Exposition: Fancy Pants and Fleur de Lis give exposition to explain the background of Coral Island and its delicately balanced environment.
