A wall of gabions in form of steel fence-baskets filled with rocks or concrete blocks and with attached anchors, which are fixed by inserted rocks, extending at least 50m up to 4km below sea level. Use of the wall as forming a fishing farm between the wall and shore. The wall is preferably protected with hanging triangular structures as surge stoppers, with massive stabilization landward, and can therefore replace conventional dikes and levees. The gabions are filled with rocks or concrete blocks, can surround pillars to protect off-shore platforms, wind power plants, bridge pillars and other submarine structures, and assist in deep-sea mining.
