Bubble fruit are small, blue fruit commonly seen growing next to water. They are commonly found in aqueous regions such as Shoreline, Garbage Wastes and Drainage System. When first found, bubble fruit function as inert projectiles. They can be thrown long distances or placed into the slugcat's stomach for later use. These 'unpopped' bubble fruit can be given to scavengers as a gift. They restore 1 food pip when eaten (1/4 as the Hunter).
When thrown or carried into water, bubble fruit 'pop' into a clear, gelatinous bubble. Hydrated fruit can no longer serve as a weapon but can instead be consumed for food. When held in water, these bubbles can increase the slugcat's buoyancy.