Rubber dolphin is the nickname for the physics set used mainly in Ecco 2 and Ecco Junior. It lets Ecco stay or bounce on bodies of solid land, depending on the situation. It is often taken advantage of in the Vortex future levels. One of the only places it was used in the first game was in the arctic stages. In areas without this physics set, if Ecco does not clear a body of land entirely in a jump, his nose will hit the ground and he will be shoved off back into the water.