PURPOSE: To provide a method, e.g. for culturing or transporting a fish or shellfish, a Crustacea, a mollusk, a sea urchin, etc.

CONSTITUTION: A tank 6 capable of being kept in an air tight state is formed by using a heat-insulating material and fish and shellfishes, etc., 1 and an aqueous solution are accommodated in the tank 6. The tank 6 is put in a refrigerator, etc., and the cooled outside air is taken and blown through an air inlet 8 formed on a cover 7 into the tank 6 by using an air pump, etc., 9 accommodated in a cover unit 3. The aqueous solution accommodated in the tank 6 is sterilized by using electrodes 12 and the electrodes 12 have respectively a net- like shape or a similar shape so as to have a wide surface area contacting with the aqueous solution.