[problem] transport, storage, in handling in the aquaculture field, deformation in the load of the weight load, damaged , without distortion, moreover, it will provide ease of a stable attachment to the bus, and spats desorption is very little lucrative of oyster farming for hooking devices suitable for the harvest of good oysters. A and a resin-made long core 1 of the elongate can be inserted into the pores to open the oyster shell top, in the middle region of the elongate core 1 is fixed the foundation 1 to another substrate to I have, in the longitudinal direction at both ends of the range of core 1, at least one pair of retaining member of shellfish 2,2 fixing members 3 for is in the central region direction along the foundation one of the long It is sequentially provided towards.BACKGROUND 1【課題】輸送、保管、養殖現場での取り扱いにおいて、重量荷重の負荷において変形、破損、歪みが無く、しかも、母線への安定な取り付けの容易性、および稚貝の脱離が非常に少ない実入りの良い牡蠣の収穫に適した牡蠣養殖用掛止具を提供する。【解決手段】牡蠣殻頂に開けた細孔に挿通可能な細長の樹脂製長尺根幹1からなり、長尺根幹1の中央域には、根幹1を他の基材に固定する為の固定用部材3、3’を有し、根幹1の長手方向の両端域には、少なくとも一対の貝の抜止用部材2、2’が長尺の根幹1に沿って中央域方向に向かって順次設けられている。【選択図】図1
