Mollusks are filter feeders that typically make water clearer. But zebra and quagga mussels filtered so much plankton from the water that they starved native mussels and fostered harmful algal blooms.

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Like many other aquatic aliens, zebra and quagga mussels spread to new bodies of water when people move them, either accidentally or deliberately. Human-built structures, such as canals ...

Six zebras wore video cameras attached to collars, capturing the equines’ daily life. Sticking with giraffes may let the two species protect each other.

Test results from a record number of invasive mussels found on two boats during an early January inspection may have been alive when they were intercepted at the Washington/Idaho border.

In the late 1980s, quagga and zebra mussels were detected in the U.S. for the first time. The species came from Central Europe, and quickly infested the Great Lakes. From that point, quagga and ...