Problem to be solved: to provide a living organism transportation system capable of enabling long term transportation of aquatic organisms while securing a living space of aquatic organisms as much as possible.Water tank 2 storing water W together with aquatic organismsComposed of a porous materialThe water purification element 8 having the porous material carrying the nitrifying bacteria is housed in the inside, andThe nitrification reactor 3 for supplying water W from above to the water purification element 8 andGas a to nitrification reactor 3The air supply part (fan) 11 which sends oxygen O andA flow path 6 for circulating water w between the water tank 2 and the nitrification reaction tankIncludes 15.Diagram【課題】水中生物の生存スペースをなるべく大きく確保しつつ、水中生物の長時間の輸送を可能にし得る水中生物の輸送装置を提供する。【解決手段】水中生物と共に水Ｗを貯留する水槽２と、多孔質体により構成され、硝化菌を担持する多孔体を備えた水浄化エレメント８を内部に収容すると共に、水浄化エレメント８に対して上方から水Ｗを供給する硝化反応槽３と、硝化反応槽３へガス（空気Ａ、酸素Ｏ）を送り込む送気部（ファン）１１と、水槽２と硝化反応槽３との間で水Ｗを循環させる流路６，１５とを備える。【選択図】図１
