The present invention refers to beams, which improves working efficiency and water as a fishing reef is formed inside the tie. disclosure. Slid water as a fishing reef said stepwise fishing reef ([...]) to which the light inputted, fishing reef spaces are words which are connected together by by shut-water, is big in the state where the flux upstream side to the downstream side of water may not be discharged to the outside of the water on to the between the upstream side and downstream side in transmission which is both chargable and can be auger freely the air which will bite , submerged when the fish reef space a frame is able to be a dwell of water transmission upper and lower stream ecosystem so as to fall the hanging groove real estate can be conserved as the, transmission water fish when auger between the upstream side and downstream side in the main body or be withdrawn externally capture of the risk or birds' food feeling is. provided to prevent a.