What Is An Asian Swamp Eel And What Does It Look Like?
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Swamp eels are freshwater fish, but they are not closely related to other living eels or snake-like marine and freshwater fishes. In addition to the name swamp eel, other English common names used for members of this group of fish include rice eel, rice-paddy eel, and belut. The swamp eel family includes more than a dozen species.
Asian swamp eels may be confused with a number of native animals, including the native American eel, as well as several eel-like amphibians such as sirens and amphiumas. But unlike the American eel, swamp eels do not migrate to the ocean to spawn. The swamp eel has a snake-like body with no noticeable scales or fins. The head is relatively short and the teeth are small and not easily seen. The gill opening forms a V-shape on the lower throat area. The body and head are dark, sometimes dark olive or brown above, and their underside is usually lighter, often light orange. Some are brightly colored with yellow, black, and gold spots over a light tan or almost-white background. The skin produces a thick mucous layer making the eels difficult to hold.
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How can the spread of Asian swamp eels be prevented? How can the spread of Asian swamp eels be prevented?
The USGS focus is to document the eel’s geographic distribution and to learn as much as possible about its behavior and biology. The resulting information is considered critical in helping to develop strategies aimed at containing or controlling its spread. Meanwhile, catching and transporting Asian swamp eels for use as bait, food, or aquarium pets is highly discouraged.
How can the spread of Asian swamp eels be prevented?How can the spread of Asian swamp eels be prevented?
The USGS focus is to document the eel’s geographic distribution and to learn as much as possible about its behavior and biology. The resulting information is considered critical in helping to develop strategies aimed at containing or controlling its spread. Meanwhile, catching and transporting Asian swamp eels for use as bait, food, or aquarium pets is highly discouraged.
Learn More
What is an invasive species and why are they a problem? What is an invasive species and why are they a problem?
An invasive species is an introduced, nonnative organism (disease, parasite, plant, or animal) that begins to spread or expand its range from the site of its original introduction and that has the potential to cause harm to the environment, the economy, or to human health. A few well-known examples include the unintentional introduction of the West Nile virus, chestnut blight, the South American...
What is an invasive species and why are they a problem?What is an invasive species and why are they a problem?
An invasive species is an introduced, nonnative organism (disease, parasite, plant, or animal) that begins to spread or expand its range from the site of its original introduction and that has the potential to cause harm to the environment, the economy, or to human health. A few well-known examples include the unintentional introduction of the West Nile virus, chestnut blight, the South American...
Learn More
What are Invasive Carp? What are Invasive Carp?
Carp are not native to North American waters, but various carp species have been introduced here since the mid-1800s, much to the detriment of native fish. Although carp eradication measures have been active for over 100 years, long-established species, like the common carp, are present in almost every state. Invasive carp (bighead, black, grass, and silver carp) were imported to the United States...
What are Invasive Carp?What are Invasive Carp?
Carp are not native to North American waters, but various carp species have been introduced here since the mid-1800s, much to the detriment of native fish. Although carp eradication measures have been active for over 100 years, long-established species, like the common carp, are present in almost every state. Invasive carp (bighead, black, grass, and silver carp) were imported to the United States...
Learn More
What are zebra mussels and why should we care about them? What are zebra mussels and why should we care about them?
Zebra mussels are an invasive, fingernail-sized mollusk that is native to fresh waters in Eurasia. Their name comes from the dark, zig-zagged stripes on each shell. Zebra mussels probably arrived in the Great Lakes in the 1980s via ballast water that was discharged by large ships from Europe. They have spread rapidly throughout the Great Lakes region and into the large rivers of the eastern...
What are zebra mussels and why should we care about them?What are zebra mussels and why should we care about them?
Zebra mussels are an invasive, fingernail-sized mollusk that is native to fresh waters in Eurasia. Their name comes from the dark, zig-zagged stripes on each shell. Zebra mussels probably arrived in the Great Lakes in the 1980s via ballast water that was discharged by large ships from Europe. They have spread rapidly throughout the Great Lakes region and into the large rivers of the eastern...
Learn More
What are snakeheads? What are snakeheads?
Snakeheads are air-breathing freshwater fishes that are not native to North America. In scientific terms, snakeheads are divided into two distinct genera: Channa (snakeheads of Asia, Malaysia, and Indonesia) Parachanna (African snakeheads) In the summer of 2002 and again in late spring 2004, Channa argus, the northern snakehead, generated national media attention when anglers caught this fish in a...
What are snakeheads?What are snakeheads?
Snakeheads are air-breathing freshwater fishes that are not native to North America. In scientific terms, snakeheads are divided into two distinct genera: Channa (snakeheads of Asia, Malaysia, and Indonesia) Parachanna (African snakeheads) In the summer of 2002 and again in late spring 2004, Channa argus, the northern snakehead, generated national media attention when anglers caught this fish in a...
Learn More Label List Grid
Live Asian Swamp Eels Sold in a U.S. Market Live Asian Swamp Eels Sold in a U.S. Market March 14, 2016 Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. Market Live Asian Swamp Eels Sold in a U.S. MarketThese live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.
By Ecosystems, Communications and Publishing March 14, 2016 Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. MarketLive Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. MarketThese live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.
By Ecosystems, Communications and Publishing
Live Asian Swamp Eels Sold in a U.S. Market Live Asian Swamp Eels Sold in a U.S. Market March 14, 2016 Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. Market Live Asian Swamp Eels Sold in a U.S. MarketThese live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.
By Ecosystems, Communications and Publishing March 14, 2016 Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. MarketLive Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. MarketThese live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.
By Ecosystems, Communications and Publishing
CoreFacts Album Artwork CoreFacts Album Artwork How did Asian swamp eels get here? How did Asian swamp eels get here? CoreFacts Album Artwork CoreFacts Album Artwork June 16, 2009 How did Asian swamp eels get here?
How did Asian swamp eels get here? How did Asian swamp eels get here?Listen to hear the answer.
By Communications and Publishing CoreFacts Album Artwork CoreFacts Album Artwork June 16, 2009 How did Asian swamp eels get here?
How did Asian swamp eels get here?How did Asian swamp eels get here?
How did Asian swamp eels get here?Listen to hear the answer.
By Communications and Publishing CoreFacts Album Artwork CoreFacts Album Artwork What do Asian swamp eels eat? What do Asian swamp eels eat? CoreFacts Album Artwork CoreFacts Album Artwork July 23, 2008 What do Asian swamp eels eat?
What do Asian swamp eels eat? What do Asian swamp eels eat?Starting next Wednesday, July 30, CoreFacts will be delivered once a week instead of daily, in order to bring you better content. Please let us know how you feel about CoreFacts via an e-mail to [email protected]. Listen to hear the answer.
By Communications and Publishing CoreFacts Album Artwork CoreFacts Album Artwork July 23, 2008 What do Asian swamp eels eat?
What do Asian swamp eels eat?What do Asian swamp eels eat?
What do Asian swamp eels eat?Starting next Wednesday, July 30, CoreFacts will be delivered once a week instead of daily, in order to bring you better content. Please let us know how you feel about CoreFacts via an e-mail to [email protected]. Listen to hear the answer.
By Communications and Publishing
video thumbnail: Asian Swamp Eels: Predation on Juvenile Largemouth Bass Asian Swamp Eels: Predation on Juvenile Largemouth Bass June 29, 2006 Asian Swamp Eels: Predation on Juvenile Largemouth Bass
Asian Swamp Eels: Predation on Juvenile Largemouth Bass Asian Swamp Eels: Predation on Juvenile Largemouth BassNon-native or introduced populations of Asian Swamp Eels (family: Synbranchidae) exist in the wild in parts of Florida, Georgia, and Hawaii. This video shows predatory behavior of captive individuals.
By Caribbean-Florida Water Science Center (CFWSC), Caribbean-Florida Water Science Center (CFWSC) June 29, 2006 Asian Swamp Eels: Predation on Juvenile Largemouth Bass
Asian Swamp Eels: Predation on Juvenile Largemouth BassAsian Swamp Eels: Predation on Juvenile Largemouth Bass
Asian Swamp Eels: Predation on Juvenile Largemouth BassNon-native or introduced populations of Asian Swamp Eels (family: Synbranchidae) exist in the wild in parts of Florida, Georgia, and Hawaii. This video shows predatory behavior of captive individuals.
By Caribbean-Florida Water Science Center (CFWSC), Caribbean-Florida Water Science Center (CFWSC) Items per page 6 12 Label March 18, 2025United States Register of Introduced and Invasive Species United States Register of Introduced and Invasive Species
The pervasive and insidious threat of invasive species costs the United States more than $120 billion, annually. An invasive species is an organism that is not native to a locality and causes (or is likely to cause) harm. An introduced species is one that is nonnative to a locality and occurs there because of human activities or their consequences, including the species’ intentional or Authors Annie Simpson, Mark T. Wiltermuth, Mireya Dorado By Science Analytics and Synthesis (SAS) Program, Science Synthesis, Analysis, and Research Program May 23, 2024READI-Net—Providing tools for the early detection and management of aquatic invasive species READI-Net—Providing tools for the early detection and management of aquatic invasive species
Overview Early detection of biological threats, such as invasive species, increases the likelihood that control efforts will be successful and cost-effective. Environmental deoxyribonucleic acid (eDNA) sampling is an established method for the efficient and sensitive early detection of new biological threats. The Rapid eDNA Assessment and Deployment Initiative & Network (READI-Net) is a... Authors Lisa McKeon, Todd G. Wojtowicz By Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Northern Rocky Mountain Science Center September 26, 2012The National Nonindigenous Aquatic Species Database The National Nonindigenous Aquatic Species Database
The U.S. Geological Survey (USGS) Nonindigenous Aquatic Species (NAS) Program maintains a database that monitors, records, and analyzes sightings of nonindigenous aquatic plant and animal species throughout the United States. The program is based at the USGS Wetland and Aquatic Research Center in Gainesville, Florida. The initiative to maintain scientific information on nationwide... Authors Matthew E. Neilson, Pamela L. Fuller By Ecosystems Mission Area, Wetland and Aquatic Research Center Items per page 6 12 Label Invasive Species Science at WARC February 25, 2025Invasive Species Science at WARC
This year, we recognize National Invasive Species Awareness Week on February 24 - 28. Learn about USGS Wetland and Aquatic Research Center (WARC)...
Read Article A new strategy to help unleash USGS eDNA capabilities June 3, 2024A new strategy to help unleash USGS eDNA capabilities
Imagine you could use just a few drops of water to know what sorts of animals and plants were present in an area. What an incredible tool this would...
Read Article A Silver Lining for Invasive Species February 22, 2023A Silver Lining for Invasive Species
Dealing with invasive species can be a real drag. Fortunately, there's a silver lining—it’s invasive species scientists!
Read Article Environmental DNA Research Sheds Light on Invasive Species March 4, 2022Environmental DNA Research Sheds Light on Invasive Species
USGS Science is Refining eDNA Techniques and Developing New Applications
Read Article Parasite in Live Asian Swamp Eels May Cause Human Illness March 12, 2014Parasite in Live Asian Swamp Eels May Cause Human Illness
Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers.
Read ArticleRelated
FAQ Items per page 6 12 Label How can the spread of Asian swamp eels be prevented? How can the spread of Asian swamp eels be prevented?
The USGS focus is to document the eel’s geographic distribution and to learn as much as possible about its behavior and biology. The resulting information is considered critical in helping to develop strategies aimed at containing or controlling its spread. Meanwhile, catching and transporting Asian swamp eels for use as bait, food, or aquarium pets is highly discouraged.
How can the spread of Asian swamp eels be prevented?How can the spread of Asian swamp eels be prevented?
The USGS focus is to document the eel’s geographic distribution and to learn as much as possible about its behavior and biology. The resulting information is considered critical in helping to develop strategies aimed at containing or controlling its spread. Meanwhile, catching and transporting Asian swamp eels for use as bait, food, or aquarium pets is highly discouraged.
Learn More What is an invasive species and why are they a problem? What is an invasive species and why are they a problem?
An invasive species is an introduced, nonnative organism (disease, parasite, plant, or animal) that begins to spread or expand its range from the site of its original introduction and that has the potential to cause harm to the environment, the economy, or to human health. A few well-known examples include the unintentional introduction of the West Nile virus, chestnut blight, the South American...
What is an invasive species and why are they a problem?What is an invasive species and why are they a problem?
An invasive species is an introduced, nonnative organism (disease, parasite, plant, or animal) that begins to spread or expand its range from the site of its original introduction and that has the potential to cause harm to the environment, the economy, or to human health. A few well-known examples include the unintentional introduction of the West Nile virus, chestnut blight, the South American...
Learn More What are Invasive Carp? What are Invasive Carp?
Carp are not native to North American waters, but various carp species have been introduced here since the mid-1800s, much to the detriment of native fish. Although carp eradication measures have been active for over 100 years, long-established species, like the common carp, are present in almost every state. Invasive carp (bighead, black, grass, and silver carp) were imported to the United States...
What are Invasive Carp?What are Invasive Carp?
Carp are not native to North American waters, but various carp species have been introduced here since the mid-1800s, much to the detriment of native fish. Although carp eradication measures have been active for over 100 years, long-established species, like the common carp, are present in almost every state. Invasive carp (bighead, black, grass, and silver carp) were imported to the United States...
Learn More What are zebra mussels and why should we care about them? What are zebra mussels and why should we care about them?
Zebra mussels are an invasive, fingernail-sized mollusk that is native to fresh waters in Eurasia. Their name comes from the dark, zig-zagged stripes on each shell. Zebra mussels probably arrived in the Great Lakes in the 1980s via ballast water that was discharged by large ships from Europe. They have spread rapidly throughout the Great Lakes region and into the large rivers of the eastern...
What are zebra mussels and why should we care about them?What are zebra mussels and why should we care about them?
Zebra mussels are an invasive, fingernail-sized mollusk that is native to fresh waters in Eurasia. Their name comes from the dark, zig-zagged stripes on each shell. Zebra mussels probably arrived in the Great Lakes in the 1980s via ballast water that was discharged by large ships from Europe. They have spread rapidly throughout the Great Lakes region and into the large rivers of the eastern...
Learn More What are snakeheads? What are snakeheads?
Snakeheads are air-breathing freshwater fishes that are not native to North America. In scientific terms, snakeheads are divided into two distinct genera: Channa (snakeheads of Asia, Malaysia, and Indonesia) Parachanna (African snakeheads) In the summer of 2002 and again in late spring 2004, Channa argus, the northern snakehead, generated national media attention when anglers caught this fish in a...
What are snakeheads?What are snakeheads?
Snakeheads are air-breathing freshwater fishes that are not native to North America. In scientific terms, snakeheads are divided into two distinct genera: Channa (snakeheads of Asia, Malaysia, and Indonesia) Parachanna (African snakeheads) In the summer of 2002 and again in late spring 2004, Channa argus, the northern snakehead, generated national media attention when anglers caught this fish in a...
Learn More Multimedia Label List Grid Live Asian Swamp Eels Sold in a U.S. Market Live Asian Swamp Eels Sold in a U.S. Market March 14, 2016 Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. Market Live Asian Swamp Eels Sold in a U.S. MarketThese live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.
By Ecosystems, Communications and Publishing March 14, 2016 Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. MarketLive Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. MarketThese live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.
By Ecosystems, Communications and Publishing Live Asian Swamp Eels Sold in a U.S. Market Live Asian Swamp Eels Sold in a U.S. Market March 14, 2016 Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. Market Live Asian Swamp Eels Sold in a U.S. MarketThese live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.
By Ecosystems, Communications and Publishing March 14, 2016 Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. MarketLive Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. MarketThese live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.
By Ecosystems, Communications and Publishing CoreFacts Album Artwork CoreFacts Album Artwork How did Asian swamp eels get here? How did Asian swamp eels get here? CoreFacts Album Artwork CoreFacts Album Artwork June 16, 2009 How did Asian swamp eels get here?
How did Asian swamp eels get here? How did Asian swamp eels get here?Listen to hear the answer.
By Communications and Publishing CoreFacts Album Artwork CoreFacts Album Artwork June 16, 2009 How did Asian swamp eels get here?
How did Asian swamp eels get here?How did Asian swamp eels get here?
How did Asian swamp eels get here?Listen to hear the answer.
By Communications and Publishing CoreFacts Album Artwork CoreFacts Album Artwork What do Asian swamp eels eat? What do Asian swamp eels eat? CoreFacts Album Artwork CoreFacts Album Artwork July 23, 2008 What do Asian swamp eels eat?
What do Asian swamp eels eat? What do Asian swamp eels eat?Starting next Wednesday, July 30, CoreFacts will be delivered once a week instead of daily, in order to bring you better content. Please let us know how you feel about CoreFacts via an e-mail to [email protected]. Listen to hear the answer.
By Communications and Publishing CoreFacts Album Artwork CoreFacts Album Artwork July 23, 2008 What do Asian swamp eels eat?
What do Asian swamp eels eat?What do Asian swamp eels eat?
What do Asian swamp eels eat?Starting next Wednesday, July 30, CoreFacts will be delivered once a week instead of daily, in order to bring you better content. Please let us know how you feel about CoreFacts via an e-mail to [email protected]. Listen to hear the answer.
By Communications and Publishing video thumbnail: Asian Swamp Eels: Predation on Juvenile Largemouth Bass Asian Swamp Eels: Predation on Juvenile Largemouth Bass June 29, 2006 Asian Swamp Eels: Predation on Juvenile Largemouth Bass
Asian Swamp Eels: Predation on Juvenile Largemouth Bass Asian Swamp Eels: Predation on Juvenile Largemouth BassNon-native or introduced populations of Asian Swamp Eels (family: Synbranchidae) exist in the wild in parts of Florida, Georgia, and Hawaii. This video shows predatory behavior of captive individuals.
By Caribbean-Florida Water Science Center (CFWSC), Caribbean-Florida Water Science Center (CFWSC) June 29, 2006 Asian Swamp Eels: Predation on Juvenile Largemouth Bass
Asian Swamp Eels: Predation on Juvenile Largemouth BassAsian Swamp Eels: Predation on Juvenile Largemouth Bass
Asian Swamp Eels: Predation on Juvenile Largemouth BassNon-native or introduced populations of Asian Swamp Eels (family: Synbranchidae) exist in the wild in parts of Florida, Georgia, and Hawaii. This video shows predatory behavior of captive individuals.
By Caribbean-Florida Water Science Center (CFWSC), Caribbean-Florida Water Science Center (CFWSC) Publications Items per page 6 12 Label March 18, 2025United States Register of Introduced and Invasive Species United States Register of Introduced and Invasive Species
The pervasive and insidious threat of invasive species costs the United States more than $120 billion, annually. An invasive species is an organism that is not native to a locality and causes (or is likely to cause) harm. An introduced species is one that is nonnative to a locality and occurs there because of human activities or their consequences, including the species’ intentional or Authors Annie Simpson, Mark T. Wiltermuth, Mireya Dorado By Science Analytics and Synthesis (SAS) Program, Science Synthesis, Analysis, and Research Program May 23, 2024READI-Net—Providing tools for the early detection and management of aquatic invasive species READI-Net—Providing tools for the early detection and management of aquatic invasive species
Overview Early detection of biological threats, such as invasive species, increases the likelihood that control efforts will be successful and cost-effective. Environmental deoxyribonucleic acid (eDNA) sampling is an established method for the efficient and sensitive early detection of new biological threats. The Rapid eDNA Assessment and Deployment Initiative & Network (READI-Net) is a... Authors Lisa McKeon, Todd G. Wojtowicz By Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Northern Rocky Mountain Science Center September 26, 2012The National Nonindigenous Aquatic Species Database The National Nonindigenous Aquatic Species Database
The U.S. Geological Survey (USGS) Nonindigenous Aquatic Species (NAS) Program maintains a database that monitors, records, and analyzes sightings of nonindigenous aquatic plant and animal species throughout the United States. The program is based at the USGS Wetland and Aquatic Research Center in Gainesville, Florida. The initiative to maintain scientific information on nationwide... Authors Matthew E. Neilson, Pamela L. Fuller By Ecosystems Mission Area, Wetland and Aquatic Research Center News Items per page 6 12 Label Invasive Species Science at WARC February 25, 2025Invasive Species Science at WARC
This year, we recognize National Invasive Species Awareness Week on February 24 - 28. Learn about USGS Wetland and Aquatic Research Center (WARC)...
Read Article A new strategy to help unleash USGS eDNA capabilities June 3, 2024A new strategy to help unleash USGS eDNA capabilities
Imagine you could use just a few drops of water to know what sorts of animals and plants were present in an area. What an incredible tool this would...
Read Article A Silver Lining for Invasive Species February 22, 2023A Silver Lining for Invasive Species
Dealing with invasive species can be a real drag. Fortunately, there's a silver lining—it’s invasive species scientists!
Read Article Environmental DNA Research Sheds Light on Invasive Species March 4, 2022Environmental DNA Research Sheds Light on Invasive Species
USGS Science is Refining eDNA Techniques and Developing New Applications
Read Article Parasite in Live Asian Swamp Eels May Cause Human Illness March 12, 2014Parasite in Live Asian Swamp Eels May Cause Human Illness
Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers.
Read ArticleExplore Search
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Tag » What Does An Eel Look Like
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