The Bladderfish is a small, passive fauna species. It can be caught and is edible, mostly populating in the Safe Shallows and the Grand Reef. The Bladderfish stands out in comparison to other small fishes, as they can be used to craft Filtered Water. As a result, Bladderfish are a good source of H₂O, though behind Disinfected Water and Large Filtered Water. Being slow and passive, Bladderfish are easy to catch, especially during night time, when they are next to immobile due to their diurnal properties.