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Smithsonian Environmental Research Center

A lionfish with elongated spines and red and white stripes swims through a reef.

Eight of the Worst Marine Invaders, According to Scientists

Lionfish, mitten crabs and "sea vomit." Meet eight marine species inadvertently brought to new territory that are taking the aquatic world by storm.

North American River Otter (Lontra canadensis) at Florida's Pelican Island National Wildlife Refuge. (Credit: Keenan Adams, U.S. Fish & Wildlife Service)

River Otters Take Party Pooping To A New Level

For river otters, pooping is a social event. And their droppings are providing a heap of information for biologists.

Lontra canadensis, the North American river otter. (Credit: Matthew Fryer)

The Secret Lives of River Otters (And Their Parasites)

If you live along the water but have never seen a river otter, it's probably because they're mostly nocturnal, and very shy. But these secretive creatures, and their parasites, hold lots of clues for scientists looking to understand disease.

Katrina Lohan analyzes parasite DNA in SERC’s Ecological Genomics Core. The results help detect parasites infecting oysters or lurking the ballast water of large ships. (Credit: Kristen Minogue/SERC)

Confessions of a Real Life Scientist: The Thrill of Learning

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