To provide an aquarium for observation that combines natural substances such as wood, stone, shells, coral and the like, and a tank. SOLUTION: An ornamental water tank 1 is composed of a natural object 2 and a water tank 3 having a concave portion 4 adapted to the approximate shape of the natural object. Natural object 2 is one or more of natural products consisting of wood, stone, shells and coral, preferably wood, more preferably driftwood. Also, if the ground plane of the natural object 2 is stable when it is combined with the water tub 3 to form the aquarium tank 1, it is not necessary to process it in particular, but if it is unstable, the ground plane of the natural object 2 is flattened To have. BACKGROUND OF THE INVENTION【課題】木、石、貝殻、サンゴ等の自然物と、水槽を組み合わせた鑑賞用水槽を提供する。【解決手段】観賞用水槽1は、自然物2と、前記自然物の略形状に合わせた凹部4を有する水槽3からなるものである。自然物2は、木、石、貝殻およびサンゴからなる自然物の1種以上であり、木が好ましく、流木がより好ましい。また、自然物2の接地面は水槽3と組み合わせて観賞用水槽1とした際に安定であれば特に加工しなくてもよいが、不安定であれば自然物2の接地面は平らに加工しておく。【選択図】図1
