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.e. sturgeon chub) but these fish are not related to sturgeon.

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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.

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...

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”). Learn more: Sea Lamprey Species Profile
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Date published: August 5, 2016

Evaluation of Pallid Sturgeon Science on the Missouri River

A new fact sheet documenting the development of the Missouri River Pallid Sturgeon Effects Analysis (EA) is now available from the U.S. Geological Survey. The EA is an effort to assess how Missouri River management has affected—and may affect—the endangered pallid sturgeon population.

Date published: July 30, 2015

New Evidence Shows Endangered Pallid Sturgeon Spawned in Lower Missouri River

Three tiny fish larvae that were captured by U.S. Geological Survey scientists in May 2014 have just been confirmed to be pallid sturgeon. These new genetic identifications add to mounting evidence that critically endangered pallid sturgeon spawned successfully in the Lower Missouri River downstream of Gavins Point Dam, South Dakota.

Date published: January 23, 2015

Culprit Identified in Decline of Endangered Missouri River Pallid Sturgeon

BOZEMAN – Pallid sturgeon come from a genetic line that has lived on this planet for tens of millions of years; yet it has been decades since anyone has documented any of the enormous fish successfully producing young that survive to adulthood in the upper Missouri River basin.

Date published: October 22, 2013

White Sturgeon Hatch-Success Study Yields Clues to Restoration Strategy

The eggs of endangered Kootenai River white sturgeon are less likely to hatch on some of the surfaces that have been made more common by human, or anthropogenic, changes on the river, a new U.S. Geological Survey report has found.

Date published: August 24, 2012

New Reefs Providing Hope for Struggling Sturgeon: Gentle Giants Are Back

New scientific findings from an effort to restore fish spawning habitat for lake sturgeon, walleye, lake whitefish and other native fish in the St. Clair River will be shared during a public event in Algonac City Park on Aug. 28, 2012 at 11 a.m. 

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Weighing sturgeon prior to tagging
August 1, 2016

Weighing sturgeon prior to tagging

Weighing sturgeon prior to tagging

Image: Flathead Catfish
March 21, 2016

Flathead Catfish

Nebraska Cooperative Fish and Wildlife Research Unit - Nathan Gosch (right; master's student) utilizes a gastroscope to verify that all stomach contents were recovered from a flathead catfish held by Jeff Stittle (undergraduate).

Attribution: Ecosystems
Image: Lake Sturgeon in Genesee River, NY
March 15, 2016

Lake Sturgeon in Genesee River, NY

A USGS scientist holds a five-year-old stocked lake sturgeon recaptured during a survival assessment in the Genesee River, New York.

Lake sturgeon were once a highly abundant fish species in the Great lakes, but populations are currently only about one percent of their historic abundance due to overfishing in the 1800s and early 1900s. To help bring this ancient

Attribution: Ecosystems
Image: Snake River Catfish
November 4, 2013

Snake River Catfish

USGS aquatic biologist Terry Maret displays a large catfish collected during fish sampling of the lower Snake River near Murphy, ID. Fish tissue samples were collected from selected fish to analyze for the presence of mercury as part of a monitoring program the USGS is conducting in cooperation with the City of Boise.

Image: Huron-Erie Corridor Lake Sturgeon
June 4, 2013

Huron-Erie Corridor Lake Sturgeon

Lake sturgeon collected on restored spawning grounds in the lower St. Clair River.

Image: Flathead Catfish

Flathead Catfish

Biologist holding a flathead catfish caught by trammel net in the Lower Missouri River.

Attribution: Water Resources