Both, when salt is added to water where the egg is located, the water becomes denser. When an objects density is lower than the contents it is held in it floats.
Egg Flotation Buoyancy And Density. Do Eggs Sink Or Float?
Both. In saltwater with at least 4 tsp. Of salt, it floats. In regular freshwater, it sinks.
In salt water it floats and in fresh water it sinks...