A proposal for the thematic pavilion on water for the 2012 Yeosu International Exposition, whose theme is « for living coasts and oceans ». This is also the second series of the « mobile tower » in a flexible skin by carbon fiber. The skin is set in motion by the motorized oval-shaped mechanism to remind the image of the tide. A reflection on architecture that would visually melt into nature by materials and light, and also that functionally synchronize with environment by sustainable approach exploiting the inertia of sea water.