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AUSTIN, Texas (AP) – Texas has kicked off a public awareness campaign to help stop the spread of invasive zebra mussels as boaters prepare for the summer.

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The Texas Parks & Wildlife Department on Friday said the $400,000 advertising effort is called “Clean, Drain, and Dry.”

The agency is joined by a coalition of river authorities, water districts and municipalities in the effort to raise public awareness about zebra mussels. The creatures can clog water intake systems.

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Zebra mussels were confirmed in Texas in 2009 at Lake Texoma and have spread to several other waterways.

Boaters are required, by Texas law, to drain and clean their watercraft to help stop the spread of zebra mussels.

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