| 摘要 |
PROBLEM TO BE SOLVED: To provide a fantastic view by spatially connecting a pond, a river or an aquarium of the present invention to a separately placed water tank at the eye level, to enable the observation of fish from a lateral side, from the top or from both directions, to easily transfer an object between the aquarium and the outer environment without diving into the water or removing the water from the aquarium and to enable the exchange of water or the generation of water flow in the aquarium. SOLUTION: Legs 3 are attached to the bottom of a top-closed and bottom- opened aquarium 1 and fixed to the bottom of a pond 4, etc., to sink the aquarium to a level slightly above the lower end 2 of the aquarium main body and the aquarium is filled with water. The aquarium 1 is connected through a tube 6 to a pond 4', etc., having water level different from that of the pond 4, etc., provided with the aquarium 1.
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