Among European freshwater fishing-grounds, the Danube is only surpassed by the Volga; the most valuable fish being sturgeon and sterlet, mostly netted in the St George mouth; carp, often weighing 50 lb; pike, perch, tench and eels.
The streams of both territories yield excellent trout and crayfish; salmon, sturgeon and sterlet, from the Danube, are netted in the Save.