A remarkable feature of the morphological instability is that it is reversible, i.e., when pronounced instability develops in pure water, it disappears when exposed to dry atmosphere, or is diminished in salt water. Then again, when the flattened film is re-immersed in distilled water, the morphological patterns re-emerge fully, Figure ). We conjecture that this phenomenon would be relevant for the release of foulants from ship hull, as the movement of the ship through marine water of variable salinities is expected to lead to dynamic transition of the coating's morphology thus inducing a time dependent deformation of the film.