A plurality of block groups is constructed by connecting a plurality of block bodies in an annular form by extending a rope/steel wire through penetrating holes. The total length of the rope/steel wire is set in such a way that the average length between the block bodies is 0.1-4 times of one side length of a block body. At least a part of a substantially conical artificial submarine mountain can be constructed by having a plurality of block groups that is connected with the rope/steel wire having a set length falling down from the sea surface and piled on the sea bed. An artificial submarine mountain is formed by repeatedly arranging a plurality of conic structures in a linear manner in a direction of obstructing the ocean current so that a projecting area S1 of the artificial submarine mountain in the direction of the ocean current is set to be 1.6-8 times of a projecting area S2 of the artificial submarine mountain in the direction of obstructing the ocean current.藉由插通貫通孔之繩索/鋼絲,將複數塊體呈環狀連結而製作出複數塊群。繩索/鋼絲之全長設定為,各塊體間之繩索/鋼絲之長度平均為塊體一邊之長度之0.1~4.0倍。使藉由設定長度之繩索/鋼絲連結之複數塊群海面上落下而堆積於海底面,構築略圓錐體狀之人工海底山脈之至少一部份。將複數圓錐體構築物在遮住海水之洋流之方向上呈直線的重複配列之人工海底山脈,在沿著海水之洋流之方向上的人工海底山脈之投影面積S1設定為遮住海水之洋流之方向上之人工海底山脈之投影面積S2的1.6~8倍。1‧‧‧圓錐體構造物S1‧‧‧沿著海水之洋流之方向上的人工海底山脈之投影面積S2‧‧‧遮住海水之洋流之方向上之人工海底山脈之投影面積
