A study found that invasive zebra mussels significantly alter aquatic ecosystems, and are associated with elevated mercury concentrations in fish. Mercury, a potent neurotoxin, poses a serious threat ...

A decade ago, when news broke that zebra mussels had found their way to Cass Lake, I was dismayed but not surprised. Since escaping from the ballast of an ocean-going vessel in Lake Superior sometime ...

A tiny fish is helping scientists understand how the anesthetic drug ketamine relieves depression. NPR's Jon Hamilton reports on research showing how ketamine altered the brain of a zebrafish. JON ...

Water managers and state wildlife officials last year hoped the discovery of a microscopic zebra mussel larva in the Colorado River was a one-time event, not a sign of a larger problem lurking beneath ...

PARK RAPIDS, Minn. — The Minnesota Department of Natural Resources has confirmed the presence of zebra mussels, an aquatic invasive species, in Fish Hook Lake north of Park Rapids. In October, the DNR ...

GOLDEN VALLEY, Minn. — Many of us know all too well about sleep (or lack thereof), and the art of catching Zzzzzs remains a mystery to scientists. Now, a little fish is giving us clues to the origins ...

VIB researchers at the Catholic University of Leuven have shown for the first time that new blood vessels do not grow in random directions, but that they are guided by specific signal molecules. This ...

Stingrays and zebra mbuna fish can perform simple addition and subtraction involving numbers between 1 and 5. Several studies have shown that fish can tell the difference between higher and lower ...

New research shows that the anesthetic ketamine keeps fish from giving up — and the way it works may help figure out how it works in humans and lead to better medications for depression. A tiny fish ...