Blue Cave Guppy

The Blue Cave Guppy is a common fish native to the Undergrounds. It is one of the many fish species found beneath the surface of Core Keeper’s world, and its designation as a common catch places it among the more ordinary aquatic creatures rather than a rare or boss-related fish.

As with other native fish, the Blue Cave Guppy is part of the Undergrounds’ broader ecosystem. Its presence helps define the region’s underwater life, and official concept art exists for the fish, indicating it was part of the game’s early visual development.