PROBLEM TO BE SOLVED: To provide means that can anchor an underwater installation member in the water bottom by simple work and maintain an anchored condition for a long period of time, when installing a grid or net-like underwater installation member in water for the purpose of protecting and growing aquatic organisms.SOLUTION: An anchor A is provided for anchoring an underwater installation member B for protecting or growing aquatic organisms on a surface C to be installed in the water, the anchor including each leg B1 constituting an entity portion by being formed substantially in a grid or net-like pattern and each opening part B2 surrounded by the legs B1, B1, B1, B1. The anchor includes a flange part 1 and a shaft part 2 set up from a back side 11 of the flange part 1. The underwater installation member B is configured to be sandwiched between the flange part 1 and the surface C to be installed, by being driven into the surface C to be installed while the shaft part 2 is inserted in the opening part B2 and the abutment between plural parts of the legs B1 surrounding the opening parts B2 and the back side 11 of the flange part 1 when anchoring the underwater installation member B to the surface C to be installed.COPYRIGHT: (C)2015,JPO&INPIT【課題】水生生物の保護育成を目的として、格子状又は網状の水中設置部材を水中に設置する場合において、水中設置部材を簡易な作業で水底に固定でき、かつ固定した状態を長期間維持できる手段の提供。【解決手段】略格子状又は網状に形成されたことにより、実体部分を構成する各脚部B1と、脚部B1、B1、B1、B1により囲繞された各開口部B2とを備えた水生生物の保護又は育成用の水中設置部材B、を水中の被設置面Cに固定するための留め具Aであって、鍔部1と、鍔部1の裏面11から立設された軸部2とを備え、水中設置部材Bを被設置面Cに固定する際に、軸部2が開口部B2を挿通した状態で被設置面Cに打ち込まれるとともに、開口部B2を囲繞する脚部B1のうちの複数と鍔部1の裏面11とが当接されることにより、水中設置部材Bが鍔部1と被設置面Cとの間に挟み込まれる構成。【選択図】図1
