Hydrilla is an aquatic invasive that has been found in Tompkins County

Aquatic Invasives

Plant and animal invasives threaten our watersheds here in the Finger Lakes and elsewhere, but residents can be informed, and learn ways to identify, report and help control their presence.

Bloom of cyanobacteria ("blue-green algae").
traces shaped streaks are traces of fish and ducks that run on water, "breaking" the biofilm. The samples emit a strong odor of algae (spirulina type). Location: "Quai du Wault" in Lille, not far from downtown (north of France; Location vai google maps: 50.637485,3.05425)

Blue-Green Algae

Studies have linked invasive hydrilla to a deadly toxin produced by blue-green algae, resulting in illness and death of wild birds and domestic pets.

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Hydrilla, Hydrilla verticillata


Hydrilla is an aquatic invasive species in New York state. Find out more here about how you can identify the plant and what you can do to help.

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zebra mussel
Dreissena polymorpha (Pallas)

Zebra Mussels

Zebra mussels filter vast amounts of plankton, which decreases the food source of other species and subsequently causes a lack of clarity in the water. Learn the dangers of zebra mussels and how to prevent their spread, here.

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Asian shore crab 
Hemigrapsus sanguineus

Asian Shore Crab

The Asian Shore Crab originated in the western part of the Pacific Ocean and their growing population threaten both coastal ecosystems and aquaculture operations. Learn the dangers of Asian shore crab and how to prevent its spread, here.

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Chinese mysterysnail 
Bellamya chinensis

Chinese Mystery Snail

Chinese mystery snails can form dense populations and outcompete native species for food and habitat in lakes and streams. Learn the dangers of Chinese mystery snail and how to prevent its spread, here.

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Asian Carp Jumping

Asian Carp

“Asian carp” typically refers to two species of invasive fish introduced from Asia: the bighead carp and the silver carp. Learn the dangers of Asian carp and how to prevent its spread, here.

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Last updated October 3, 2018