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This week at the Smithsonian Ocean Portal we embark on an experiment we're calling "Make Me Care." The concept is simple: we ask a renowned expert to tell us why we should care about...
“Sea grapes” may sound like something Poseidon would snack on, and not a killer...
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Hopefully you've never bitten into a delicious hunk of snow crab meat and...
These brittlestars ( Ophiothela mirabilis ) are not where they belong. These...

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This bivalve mollusk is native to the Caspian Sea, lagoons of the Black Sea, and their inflowing rivers. It lives in fresh and brackish water and cannot tolerate full seawater. In the 18th and 19th centuries, zebra mussels spread...
Rapa whelks , native to Asia, have invaded the Chesapeake Bay and are...
This ctenophore (a stingless jellyfish-like animal) is native to the east...

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Regardless of what continent you live on, the waters that surround it are home to marine invaders. The ocean is teeming with...
Large organisms, like these tunicates, live inside the recesses of a ship's hull while microscopic organisms form a film across all the painted surfaces on the boat.
During the summer of 1998, scientists at the Virginia Institute of Marine Science made a series of disturbing discoveries in the Chesapeake Bay. In June, they collected an unusual specimen: a single...
Dennis Whigham , a senior botanist at the Smithsonian Environmental Research Center , makes his quick pitch for why you should care about the wetland plant Phragmites australis . A European strain of...
Pick up any news article about invasive species and you may confuse it with a police blotter. Generally, invasive species are "almost bulletproof" "marauders," "terrorizing" ecosystems and wildlife...
When people sail the sea, marine organisms tag along. If carried long distances, these hitchhikers can invade and disrupt ecosystems far from their natural homes, pushing out the local species. Some...
This ctenophore (a stingless jellyfish-like animal) is native to the east coast of North and South America. In 1982, it was discovered in the Black Sea, where it was transported by ballast water . It...
When people sail the sea, marine organisms tag along. If carried long distances, these hitchhikers can invade and disrupt ecosystems far from their natural homes, pushing out the local species. Some...
Invasive species can have a range of environmental and economic impacts. In this photo sea squirts foul an oyster cage. Scientists at the Smithsonian Environmental Research Center's Marine Invasions...
“Sea grapes” may sound like something Poseidon would snack on, and not a killer algae. Yet Caulerpa racemosa var. cylindracea poses a serious threat to marine life. Spread by the bilge water of boats...
The majestic and highly predatory red lionfish ( Pterois volitans ) , native to the Indo-Pacific, is invading Atlantic waters. The lionfish is a popular home aquarium species, and some were most...
I am once again leaving my familiar world behind and descending into the abyss below. The first dive of an entirely new expedition is the most magical. I am a member of a scientific research dive...
Jellyfish and comb jellies are gelatinous animals that drift through the ocean's water column around the world. They are both beautiful—the jellyfish with their pulsating bells and long, trailing...
This photograph, much like Van Gogh’s Starry Night is awhirl with the colors and swishes of hundreds of fish. The focal point, however, is the lionfish. Lionfish ( Pterois antennata ) have been known...
A strain of this green seaweed, native to the Indian and Pacific Oceans, escaped public and private aquariums in California, Japan, Australia, and Monaco. It has spread widely in the Mediterranean,...
This week at the Smithsonian Ocean Portal we embark on an experiment we're calling "Make Me Care." The concept is simple: we ask a renowned expert to tell us why we should care about his or her...
This bivalve mollusk is native to the Caspian Sea, lagoons of the Black Sea, and their inflowing rivers. It lives in fresh and brackish water and cannot tolerate full seawater. In the 18th and 19th...
Alaska’s pristine coastline is ripe for an influx of invasive marine species such as the European green crab and the rough periwinkle (an Atlantic sea snail), warns a new study by a team of...
These brittlestars ( Ophiothela mirabilis ) are not where they belong. These animals, usually found in the Pacific Ocean, were first spotted in the Atlantic Ocean off the coast of Brazil in 2000. And...
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