The present invention relates to a compound consisting of a second rope net with a steel frame. Prior to the present invention, because it is a concrete cube eocho or forced (鋼製) with a large majority to be the weight of the body eocho they block the flow of birds and bird geoseulryeo the flow of the vortex to be formed, but insists infused prey , the fact is turbid stream and on the other hand is caused by the vortex and the mud is mud layer formed on eocho itself Prevent epiphytic algae and cause problems even around the reefs. In addition, the bar is not to be overlooked that the settlement phenomenon and vortex generated by the block, eocho weight of birds all that have a serious adverse effect on eocho, the present invention solve this problem and to provide an environment which requires that marine organisms install a rope nets and steel plates for hiding the steel structure that can relieve depression by weight and distribution of birds wijip to further enhance the effect of epiphytic algae and fish that will. Triangle, square, trapezoid, steel beams, rope nets, iron for shelter