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Invasive plants and animals have many impacts on fish and wildlife resources. They replace native plants which support wildlife and erosion. They spread quickly. Too many weeds is not good for lake health. They can block access to the water and make it difficult to swim, paddle or boat. They also reduce oxygen levels in the water that are essential for fish to thrive.

Eurasian watermilfoil is a rooted submerged aquatic plant. The leaves are feather-like with four leaves arranged in a whorl. The plant is native to Europe and Asia. The species was likely introduced and spread though movement of watercraft and water-related equipment. Its appearance is similar to native Northern Watermilfoil and native Coontail.

Starry stonewart is a submerged aquatic macroalgae with many irregular branches. It is native to Europe. Fragments can easily attach to the fur and feathers of mammals and birds, or attach to boats or fishing equipment and spread from one water body to another. It forms dense mats in lakes and can affect the diversity of other aquatic plants. It looks similar to native Chara.

Curly-leaf pondweed is a perennial native to Asia and Australia. It was introduced to the US by hobbyist who used it as aquarium plant. It begins growing in early spring before most other weeds. It has small "teeth" visible along the edge of the leaf. It can be easily confused with the Clasping Leaf pondweed that does not have teeth" on edge. It is spread through burr like winter buds (turions), which are moved along waterways.

Carolina Fanwort (Cabomba) is also know as Fanwort. It roots itself into the mud of shallow water. It is native to Brazil, Argentina and SE US. It forms a dense mat which with alters oxygen and ph levels. It reduces sunlight penetration and interferes with recreational water use. It was introduced for aquariums and water gardens.