An object of the present invention is to provide a cover for preventing poaching of fish reefs, which is easy to install and versatile, and allows the installer to relatively easily open and close a door. Kind Code: A1 A metal lattice-shaped member, which is large enough to cover the entire target fish reef or a portion of a fish reef inhabiting the aquatic organisms to be raised, and which is provided with a doorway (4) having an upwardly open door (3) in a part thereof. In this case, the gap between the lattices of the cover is such that a human fist cannot enter, and the door has a weight that cannot be opened manually. [Selection diagram] Fig. 1【課題】設置が簡単で汎用性があり、設置者による扉の開閉が比較的簡単に行える魚礁の密漁防止覆い体を提供する。【解決手段】目的の魚礁全体又は育成する水棲生物が生息する魚礁の部分を覆う大きさで、その一部に上開きの扉３を有する出入り口４が設けられた、金属製の格子状の部材から成る覆い体２であって、覆い体の格子の隙間は、人間の拳が入り込めない大きさであり、扉が、人力では開けることができない重さである。【選択図】図１
