PROBLEM TO BE SOLVED: To provide granules for gathering aquatic organisms which can gather aquatic organisms and a system that can clean an area of water by efficiently treating excreta (pseudofeces) from bivalves.SOLUTION: The granules for gathering aquatic organisms 1 comprise: a core body 2 obtained by impregnating porous granules with a component for collecting aquatic organisms and a coating layer 3 formed on the surface of the core body 2 and composed of a hydraulic composition. The cleaning system for an area of water comprises bivalves arranged in the granules for gathering aquatic organisms 1 and the vicinity of the granules for gathering aquatic organisms 1.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】水生生物を蝟集することができる水生生物蝟集用粒体、及び、二枚貝からの排泄物(偽糞)を効率的に処理することができ、水域を浄化することができるシステムを提供する。【解決手段】水生生物を蝟集するための成分を、多孔質の粒体に含浸させてなるコア体2、および、コア体2の表面に形成された、水硬性組成物からなる被覆層3を含む水生生物蝟集用粒体1。水生生物蝟集用粒体1、および、水生生物蝟集用粒体1の近傍領域内に配置した二枚貝を含む水域浄化システム。【選択図】図1
