Sturgeon
The sturgeon originally comes from the Eastern bloc, including Russia, Romania and Hungary. In the country side a sturgeon may reach as many as six yard with a weight of maximum 400 kilograms. A sturgeon may reach the age of about 50 to 100 years. It is a beautiful fish which has an almost prehistoric appearance. It looks a bit like a shark. A sturgeon belongs to the most primitive among the bony fish. While sturgeons used to be found in all large European rivers, they now have nearly disappeared except for a few small populations.
By nature a sturgeon is a strong fish which will not easily fall ill. However, it is a fish which may grow very big in a pond, although this may last rather long. A pond should therefore have a depth of minimum 50 in everywhere and it should contain very few plants. Assume that per sturgeon you have 1,000 litres of water in your pond. Moreover you absolutely need a powerful filter because a sturgeon likes a strong current. On the bottom of your pond a sturgeon likes a layer of mud and absolutely no sharp gravel or sand because it is sensitive to it.