PROBLEM TO BE SOLVED: To provide an aquatic life raising method and an aquatic life raising device capable of improving growth efficiency of an aquatic life.SOLUTION: An eel raising device 1 comprises: a growth tank 2 capable of storing growth water and eels； a precipitation tank 3 for precipitating excrement of eels and residue of food of eels； and an oxygen dissolution machine 4 capable of dissolving oxygen into the growth water and supplying an oxygen dissolution liquid to the growth tank 2. Food for eels containing a mineral-containing substance containing mineral, aerobic microorganisms, and oxygen, is put into the growth tank 2 storing the growth water and the eels. The oxygen is supplied to a dissolution machine body 4A of the oxygen dissolution machine 4 communicated to the growth tank 2, then the growth water is made to flow from the growth tank 2 and the precipitation tank 3 to the dissolution machine body 4 filled with oxygen, while maintaining pressure of the growth water which is lower than oxygen pressure, for dissolving the oxygen into the growth water. The obtained oxygen dissolved water is supplied to the growth tank 2.SELECTED DRAWING: Figure 1
