Are lamprey and hagfish related?

Yes. Lamprey and hagfish are both jawless fishes. They are the only living members of the taxonomical class Agnatha (Greek for “no jaws”).

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Where can I find fish consumption advisories for my state?

Most states have set fish (and wildlife) consumption advisories and recommended consumption levels. The state agency responsible for these limits varies. Examples of consumption advisory information can be found at the Environmental Protection Agency's Consumption Advisories website.

Are sturgeon and catfish related?

No. Although sturgeon and catfish can be found in the same habitats and they both have barbels (whiskerlike growths extending from the jaw), they are not closely related. Sturgeon are much more primitive than catfish. There are some catfish sold for aquariums that look somewhat like sturgeon, and some fish have common names that are misleading (i...

What is the largest freshwater fish?

Sturgeon are the largest of the freshwater fish. The beluga sturgeon in Russia is the largest freshwater fish in the world. The white sturgeon is the largest freshwater fish in North America. White sturgeon have been reported to reach lengths of 15-20 feet and weights of nearly one ton. The second largest freshwater fish in North America is the...

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...
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Date published: March 28, 2017

Sex-Shifting Fish: Growth Rate Could Determine Sea Lamprey Sex

Unlike most animals, sea lampreys, an invasive, parasitic species of fish damaging the Great Lakes, could become male or female depending on how quickly they grow, according to a U.S. Geological Survey study published today.

Date published: July 28, 2016

Controlling Those Suckers Known as Sea Lamprey

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Date published: January 4, 2016

Sea Lamprey Mating Pheromone Registered by U.S. Environmental Protection Agency as First Vertebrate Pheromone Biopesticide

Ann Arbor, MI – The U.S. Environmental Protection Agency registered a sea lamprey mating pheromone, 3kPZS, as the first ever vertebrate pheromone biopesticide in late December, 2015. Like an alluring perfume, the mating pheromone is a scent released by male sea lampreys to lure females onto nesting sites.

Date published: October 29, 2010

Great Lakes Sea Lamprey Control To be Featured on Discovery Channel’s

ANN ARBOR, MI—Sea lamprey control is a “dirty job,” one that TV star Mike Rowe will take on during an upcoming episode of the Discovery Channel’s popular program Dirty Jobs.  The segment will first air on November 2, 2010 at 9:00 EST/8:00 CST.

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Pacific lamprey mouth and teeth
June 15, 2018

Pacific lamprey mouth and teeth (Thumb)

Pacific lamprey mouth and teeth.

Sea Lamprey
December 9, 2016

Sea Lamprey

USGS sea lamprey expert Nick Johnson demonstrates the ridge of tissue, called a rope, along the back of a mature male sea lamprey. Photograph credit: Andrea Miehls, USGS

Sea Lamprey Hammond Bay Biological Station
April 11, 2014

Sea Lamprey Hammond Bay Biological Station

Sea Lamprey at the Hammond Bay Biological Statioin in Millersburg, MI

Image: River Lamprey
June 1, 2011

River Lamprey

Eyed juvenile river lamprey (Lampetra ayresii) caught in Skagit River smolt trap, 2011.

Image: Pacific Lamprey

Pacific Lamprey

Pacific Lamprey mouth suckers adhered to the glass at Bonneville Dam fish viewing window.

The native Pacific Lamprey uses the fish ladder at Bonneville Dam.  This species plays a significant role in the foodweb and in Tribal "first foods".--cultural.