La Crosse Fish Health Center

Silver carp (Hypophthalmichthys molitrix) are one of four nonnative fish species belonging to a group commonly referred to as “invasive carp”. Native to eastern Asia, silver carp were introduced to the United States during the 1970’s and 1980’s to private fish farms and wastewater...

Bighead carp (Hypophthalmichthys nobilis) are native to eastern Asia and are one of four nonnative fish referred to as “invasive carp”. These fish are large, deep bodied fish that have a large head and a large toothless mouth with a protruding lower jaw. The bighead carp eyes are far...

The pallid sturgeon was first recognized as a species different from shovelnose sturgeon by S. A. Forbes and R. E. Richardson in 1905 based on a study of nine specimens collected from the Mississippi River near Grafton, Illinois (Forbes and Richardson 1905). They named this new species...

The northern leopard frog is in the family Ranidae, the true frogs, and is one of about 28 species within the genus Rana, that occur in North America. The frog is an amphibian that the various stages of its life cycle occur both in water and on land. The northern leopard frog is a slim, smooth-...

The Higgins eye is a freshwater mussel of larger rivers where it is usually found in areas with deep water and moderate currents. Its range includes the upper Mississippi River, the St. Croix River between Minnesota and Wisconsin, the Wisconsin River in Wisconsin, and the lower Rock River...