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Zebra Mussels in Manitoba


Zebra Mussels were confirmed in Lake Winnipeg in the fall of 2013 and the Red River and Cedar Lake 2015.

Zebra Mussels are small (1 - 3 cm), clam-like aquatic animals that are a significant environmental and economic concern to Manitoba. Native to Eastern Europe and Western Asia, Zebra Mussels have caused millions of dollars in damage to the Laurentian Great Lakes area and have cost the North American economy billions of dollars to control. Despite the successful eradication of Zebra Mussels in the four treated harbours in Lake Winnipeg in 2014, Zebra Mussels were found elsewhere in the south basin and are successfully reproducing. Lake Winnipeg is in the early stages of invasion by Zebra Mussels - eradication is no longer an option.

Adult Zebra Mussels have a shell and can strongly attach to water-based conveyances such as watercraft, trailers, water-based aircraft, ORVs and other water-related equipment. They can survive out of water for 7 to 30 days depending on temperature and humidity.

Larval Zebra Mussels, called veligers, passively move downstream by water movement and are invisible to the naked eye. Veligers rely on water to survive thus they can be inadvertently carried in small amounts of water transported by un-drained watercraft, water-based aircraft, ORVs and water-based equipment such as bait buckets.

Once Zebra Mussels become established they cannot be eradicated, so it is extremely important to stop their spread.

An adult Zebra Mussel
An adult Zebra Mussel

Micorsocopic Zebra Mussel veligers found in a small sample of water
Microscopic Zebra Mussel veligers found in a small sample of water

All Water Users - Stop the Spread of Zebra Mussels

CLEAN + DRAIN + DRY your watercraft, trailer and all water-related equipment and
DISPOSE of any unwanted bait in the trash.

Zebra Mussels Can Hide Here