PROBLEM TO BE SOLVED: To provide a tool for preventing feeding damage on marine algae capable of constructing seaweed beds in an early period by defending the growing points of the marine algae from the feeding by vegetable eating fish by an economical method in a good efficiency, and concrete blocks with a feeding-preventing function on the sea algae.SOLUTION: This tool for preventing the feeding damage on marine algae is configured to include a central shaft part 2 and a plurality pieces of protruding parts 3, and the protruding parts 3 are constituted so that each of adjacent protruding parts 3 protrudes with each other radially from the central shaft part 2 by taking an angle interval of 45 to 120° around the longitudinal axial line C of the central shaft part 2, and also protrudes within a range of 45 to 135° toward the longitudinal axial line C of the central shaft part 2.COPYRIGHT: (C)2012,JPO&INPIT【課題】植食性魚類の補食から海藻の生長点を効率よく、かつ、経済的な方法で防御することにより、早期に藻場を造成することができる海藻の食害防止具、及び、海藻の食害防止機能付きコンクリートブロックを提供する。【解決手段】中心軸部2と、複数本の突起部3とによって構成され、突起部3は、隣接する突起部3同士が中心軸部2の長手軸線C周りに45°~120°の角度間隔をおいて中心軸部から放射状に突出するように、かつ、中心軸部2の長手軸線Cに対して45°~135°の範囲で突出するように構成した。【選択図】図1
