The invention discloses a fish jar for decoration of a table board. The fish jar comprises a central main fish jar, expanded auxiliary fish jars, a first telescopic rod, second telescopic rods and an air compressor. The multiple expanded auxiliary fish jars are arranged around the central main fish jar. The central main fish jar is connected with the expanded auxiliary fish jars through the second telescopic rods. The first telescopic rod is located at the upper and middle position of the central main fish jar. The top is provided with a thermometer. The air compressor is connected with an air conveying pipe. The air conveying pipe penetrates through the first telescopic rod and the second telescopic rods and blow air to the central main fish jar and the expanded auxiliary fish jars. The fish jar for decoration of the table board has the following beneficial effects: in different seasons, water-layer temperature changes; a user can breed fish and shrimps according to needs; the second telescopic rods can stretch or contract; positions of the expanded auxiliary fish jars can be changed; different models can be formed to facilitate feeding the user; the air compressor is capable of deodorizing running water and conveying for added oxygen; and the survival rate of fish and shrimps is increased.