The presence of live zebra mussels has been detected in Lakes Fork and Tawakoni.

This is the first detection of zebra mussel DNA in each lake.  Biologists say this is concerning, but they suspect that Lake Fork cannot sustain a zebra mussel population because of low levels of calcium, which the mussels use to construct their shells. Experts say Lake Tawakoni though is likely more susceptible. The finding of zebra mussel DNA in a lake does not necessarily mean that it is infested, but it may indicate that boaters are inadvertently moving zebra mussels or zebra mussel DNA from lake to lake.  The USGS sample from Lake Fork was collected near the FM 17 boat ramp and the samples from Lake Tawakoni were collected near Lake Tawakoni State Park and South Shore Marina. 

TPWD and a coalition of partners are working to slow the spread of zebra mussels by reminding boaters to Clean, Drain and Dry their vessels before traveling from one lake to another.