But raising of pet fish goes back to the early days of the Sung Dynasty in China, about 900 A.D., when they were raised in small bottles as house pets.
Of course the aquatic entertainment - provided by the likes of blue-striped snapper, sting rays, parrot fish and moray eels - is also (quite literally) on the house.
当然，毫不夸张地说，观赏蓝纹笛鲷、刺鳐、鹦鹉鱼、海鳗等海底娱乐项目也是免费赠送。
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Although a water garden's primary focus is on plants, they will sometimes also house ornamental fish, in which case the feature will be a fish pond.