Being installed in vertical direction, it circulates exercises, it has the removal device which removes the feed from the feed securing pin (4) lower part the submerging possible circulating transport device (3) and the circulating transport device (3) on the outside the feed securing pin for the long line which planting facilities is done (4) and the circulating transport device (3) at the time of the bottom approaching in every as needed interval.垂直方向に設置されて循環運動し、下部を水没可能な循環移送装置(3)と、循環移送装置(3)の外面に適宜間隔ごとに植設された延縄用餌固定ピン(4)と、循環移送装置(3)の下端寄りにおいて、餌固定ピン(4)から餌を取外す取外し装置を備える。
