Via Foxbaltimore.com Biologist are concerned with the spread of Zebra Mussels because they are invasive and force out other species. The Zebra mussels were found in Havre de Grace last month. But, the spread can be stopped by boaters. Read More. White House Blocks Vacation Photos Of Sasha, Malia Families Of Jovan Belcher, Kassandra Perkins Battle For […]