The following are aquatic species that are considered invasive to Nebraska.
Click any photo below to learn more about these species and what you can do to help.
Zebra and Quagga Mussels
Dreissena polymorpha, Dreissena rostiformis
Forms dense colonies and filters large quantities of plankton from water, decreasing the food supply for native species.
Algae - Didymo
Freshwater algae that attaches to rocks, plants, or other stable underwater surfaces and can form large, unattractive “blooms.”
May compete with native clams; can infest and interfere with irrigation systems and canals, and block water flow through industrial water intake pipes.
Capable of out-competing native fish for resources. They are opportunistic feeders that consume high quantities of zoo plankton and phytoplankton.
Can compete with native snail species. Potential vectors for the transmission of parasites and diseases.
A fungus that infects amphibians in their keratin containing skin layers.
A parasite that infects and degrades muscle tissue of yellow perch and other fish species. It creates thick sporophorocysts, in which spores develop.
Largemouth Bass Virus
Most bass with LBV will appear completely normal. In some cases, dying fish will be near the surface and have trouble swimming.
New Zealand Mud Snail
Freshwater snail 1/5 inch with cone-shaped shells. Can reduce food availability for native and game fish species.
Red Swamp Crayfish
Outcompete native fishes for food, prey on darters, sculpin, eggs/fry of lake trout and sturgeon.
Outcompete native fishes for food, can also feed on vegetation, tolerates eutrophic or polluted waters.
Eats and damages stands of aquatic plants, reducing food sources and aquatic habitat for aquatic invertebrates and fish.
Known for their ability to jump several feet out of the water when disturbed by boaters. They also out-compete native fish populations for resources.
Can devastate populations of native fish and wildlife. At all stages of their lives will compete with native fish for food.
Viral Hemorrhagic Septicemia (VHS)
Fish will show widespread hemorrhages (bleeding) throughout body surface; eye, skin and fins and also within the internal organs.
This parasite prevents the fish from foraging for food and evading predators, resulting in death.