Aquatic refrigerator

The utility model relates to an aquatic refrigerator comprising a refrigerator. A groove in sealed separation from a refrigerating chamber is arranged on a refrigerating chamber door of the refrigerator; and a fish jar is disposed in the groove. In the aquatic refrigerator, the fish jar is arranged on the refrigerating chamber door of the refrigerator, so expense for constant temperature fish jar purchase is avoided; water in the fish jar is affected by temperature in the refrigerating chamber and outside the refrigerator, so water temperature of the fish jar is maintained at 3 to 8 DEG C, thereby being suitable for fish survival; the aquatic refrigerator can be powered by common refrigerator power, so energy consumption is reduced and environment is protected; oxygen increase via air pump exchange is unnecessary for a low temperature fish jar and aquatic death is prevented; the external side wall of the fish jar is a double-layered wall with inner vacuumization, so energy consumption can be reduced; and a mi