Owing to the restricted period allowed for hunting, deer and small game are abundant, and the brooks, rivers, ponds and lakes are well stocked with trout and black bass.
The town is a centre for salmon and trout fishing on the Blackwater and its tributary the Funshion.
There are state hatcheries at Madison (for brook and rainbow trout), Bayfield (brook, rainbow and lake trout and whitefish), Oshkosh (lake trout, whitefish and wall-eyed pike), Minocqua (pike, bass and muskallonge), Delafield (black bass and wall-eyed pike) and Wild Rose (brook trout).
Oysters, crabs, shrimp and terrapins are also abundant here, and in the inland streams are some pike, perch, trout and catfish.
Salmon, lampreys and eels are caught in some of the larger rivers; trout abound in the streams of the northern provinces; but many fresh-water fish common elsewhere in Europe, including pike, perch, tench and chub, are not found.
As soon as the ice breaks up in the delta innumerable shoals of roach (Leuciscus rutilus) and trout (Luciotrutta leucichthys) rush up the river.
Whitefish, bass, trout and pickerel are an important food supply obtained from the waters of the lake, and some perch, catfish and sunfish are caught in the rivers and brooks.
Fish are scarce in inner Persia; salmon trout and mud-trout are plentiful in some of the mountain streams. Many underground canals are frequented by carp and roach.
The rivers and lakes are generally well stocked with fish, such as salmon, trout of various species, gwyniad and vendace (especially in the north), pike, eels, perch of various species, turbot, bream and roach.
There were eight hatcheries in 1910 and the number of fish distributed from these during 1908 was about 662,000,000; they consisted chiefly of pickerel, yellow perch, walleyed pike, white fish, herring, blue pike, trout and shad.