The Government of Canada is taking action to prevent the spread of harmful aquatic invasive species (AIS) such as Zebra and Quagga Mussels. AIS threaten aquatic ecosystems, infrastructure, and the economy by reproducing rapidly, disrupting native habitats, and creating costly challenges for industries and local communities. Canadians can help prevent the spread of AIS by properly cleaning, draining and drying their watercraft before moving them to new bodies of water.