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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 marine snail...
The majestic and highly predatory red lionfish ( Pterois volitans ) , native to...
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Alaska’s pristine coastline is ripe for an influx of invasive marine species...
If you want to study invasive species in the ocean, the Panama Canal offers a...

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The spotfin lionfish ( Pterois antennata ), with venomous spines extended, is native to Indo-Pacific reefs. Certain lionfish species have invaded reefs in Florida, the Caribbean and are moving up the Atlantic coast. The native...
A strain of this green seaweed, native to the Indian and Pacific Oceans,...
The majestic and highly predatory red lionfish ( Pterois volitans ) , native...

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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...
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...
Around 100 million years ago, grass from land adapted to live and reproduce while submerged in seawater—the modern-day seagrasses. This sea invasion by land plants happened four separate times,...
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...
If you want to study invasive species in the ocean, the Panama Canal offers a lot to explore. The ships passing through can inadvertently transport plants, animals, and even parasites from the...
The European green crab ( Carcinus maenas ) has spread far beyond its native continent, to waters off North and South America, Asia and Australia. It's a voracious eater and poses a nuisance to...
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...
“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...
Regardless of what continent you live on, the waters that surround it are home to marine invaders. The ocean is teeming with plants and animals willing and able to move beyond their native habitats...
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...
The spotfin lionfish ( Pterois antennata ), with venomous spines extended, is native to Indo-Pacific reefs. Certain lionfish species have invaded reefs in Florida, the Caribbean and are moving up the...
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...
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...
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...
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...
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...
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...
Lionfish, or Pterois , are a deadly type of fish that live around reefs, although they are native to the Indo-Pacific region. These fish have been known to be invasive, and with no natural predators...
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