<；P>；PROBLEM TO BE SOLVED: To provide a fish culture system capable of culture in an inland area at a saved cost. <；P>；SOLUTION: The fish culture system includes: a rearing tank 1 set to a space in the ground； artificial rearing water 6 filled in the rearing tank 1 and prepared by adding sodium, calcium, and potassium to rearing water to have a specific gravity of not less than 1.004 and equal to or below that of natural seawater, wherein the existence ratio of potassium to calcium is from 0.93 to that in natural seawater, and the existence ratio of sodium to calcium and potassium is 55 to that in the natural seawater； a rearing water-circulating device 7 for circulating the artificial rearing water 6 filled in the rearing tank 1； and a filtration device 4 for filtering the artificial rearing water 6 filled in the rearing tank 1. <；P>；COPYRIGHT: (C)2010,JPO&INPIT
