Title: Apparatus for keeping aquatic animals alive over long period of time

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Abstract: Aquatic animals can be kept alive over a long period of time by utilizing the apparatus of the present invention comprising: a water tank for containing aquatic animals and environmental water, which tank has an inside volume large enough to contain the aquatic animals in an amount greater than 200 kg per m.sup.3 of the environmental water; a control path for containing a portion of the environmental water, which control path is located outside the water tank and is connected to the water tank through a windraw pipe and a return pipe line, while containing therein the following means: (1) means for controlling the temperature of the environmental water in the control path so that the temperature is maintained at a level as low as it is possible for the aquatic animals to exist, (2) means for bringing the environmental water in the control path into contact with air, (3) means for eliminating ammonia compounds from the environmental water, and (4) means for eliminating water-soluble organic compounds from the environmental water, and; a pump for recycling the environmental water through the water tank, the withdraw pipe line, the control path and the return pipe line.


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