Abstract: A system and a method for counteracting marine fouling of e.g. a vessel hull (1) are provided.Electro-mechanical vibration transducers (2, 3) are arranged in pairs adjacent to fixed (clamped) nodal lines (4) on said hull (1), and are driven in an inverted phase relationship in order to provide a water particle movement in a hull parallel direction right outside said nodal lines (4) in addition to the hull perpendicular relative movements right outside said transducers (2, 3).The invention also comprises a combination of the mechanical system above and a special surface coating which counteracts fouling from other organisms than those influenced by said water particle movement in the infrafrequency range.