PROBLEM TO BE SOLVED: To improve a survival rate in breeding larvae of fishes that are intractable species in seed production.SOLUTION: The breeding water circulation fluidized system is used in breeding, keeping, and moving larvae in breeding of larvae of fishes that are intractable species in seed production, The breeding water circulation fluidized system for breeding, keeping and moving the larvae of fish species that are intractable in seed producing, and a method of breeding, keeping and moving larvae in breeding the fish species that are intractable in seed production using the same are comprised of a combination of a water tank 1 having a bottom surface in a round-bottomed (hemisphere), conical, or funnel shape and a downward water flow generating device 2. The water flow rising along a water tank wall from the water tank bottom is generated by abutting the downward water flow with the water tank bottom, thus a circulation flow is generated in the breeding water 3 at the water tank bottom.COPYRIGHT: (C)2012,JPO&INPIT【課題】難種苗生産魚種仔魚の生残率を向上させる。【解決手段】難種苗生産魚種の養殖における仔魚の飼育、保管または移動に際して用いる飼育水循環流動システムであって、丸底(半球状)または円錐状ないし濾斗状の底面を有する水槽1と、下向き水流発生装置2とを組み合わせてなり、水槽底面に下向き水流を当て、水槽底部から水槽壁に沿って上昇する水流を発生させることにより、水槽内底部の飼育水3に循環流を生じさせるようにした難種苗生産魚種の仔魚の飼育、保管または移動用飼育水循環流動システム、およびそれを用いる難種苗生産魚種の養殖における仔魚の飼育、保管または移動方法。【選択図】図1
