The cocoon of the present invention is formed by a cocoon net in which at least one inlet is formed, at least one or more frames that support the cocoon net, and extending from the inlet of the cocoon net toward the inside of the frame. , And an escape prevention portion provided with at least one fish passage hole through which at least one attraction portion including an attraction opening and an isolated space are formed to allow fish that have passed through the attraction opening of the at least one attraction portion to pass therethrough Including. [Selection] Figure 21本発明の筌は、少なくとも１つの入口が形成される筌網と、前記筌網を支持する少なくとも１つ以上のフレームと、前記筌網の入口から前記フレームの内部方向に延長して形成されて、誘引口を含む少なくとも１つの誘引部と、隔離された空間を形成して、前記少なくとも１つの誘引部の誘引口を通過した魚類が通過する少なくとも１つの魚類通過孔が設けられた脱出防止部とを含む。【選択図】図２１
