PROBLEM TO BE SOLVED: To restrain worsening of a larval fish rearing environment due to overcrowding of larval fish in a lower layer of a water tank.SOLUTION: The larval fish rearing material 1 is a cylindrical body 10 with the inside used as a larval fish rearing space. An upper half part 10A of the cylindrical body 10 includes window parts 11 having openings 11A of set size, and a lower half part 10B of the cylindrical body 10 includes a net part 12 having mesh 12A of set size. The size of the opening 11A of the window part 11 is larger than that of the mesh 12A of the net part 12.COPYRIGHT: (C)2013,JPO&INPIT【課題】水槽の下層に仔魚が密集することで、仔魚の育成環境が悪化するのを抑止する。【解決手段】仔魚育成材1は、内部が仔魚の育成空間となる筒状体10であり、筒状体10の上半部10Aは設定された大きさの開口11Aを有する窓部11を備え、筒状体10の下半部10Bは設定された大きさの網目12Aを有する網部12を備え、窓部11の開口11Aの大きさを網部12の網目12Aの大きさより大きくした。【選択図】図1
