Eel Monitoring

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Fast Facts: What is eel monitoring?Photograph of volunteers handling and measuring American Eels next to the river.. Purpose is to illustrate the eel monitoring experience.

American Eels are some of New Hampshire’s most fascinating creatures. They breed in the Sargasso Sea, east of Bermuda. The tiny larval eels drift for months on ocean currents that eventually bring them to the shores of the east coast. And then as eels mature, they grow a little bigger, develop new coloration, and swim up the rivers of the East Coast into freshwater, where they spend most of their adult lives.

The American Eel is also a commercially important species, so there is a strong federal and state effort to monitor their population status. Since 2013, the Coastal Research Volunteers have assisted NH Fish and Game in expanding the number of sites at which they monitor eel migration. Coastal Research Volunteers conduct daily monitoring at an eel migration site on the Oyster River.


Volunteer Description: What do volunteer eel monitors do?

Volunteer Experience: Coastal Research Volunteers monitor migrating eels once daily, Monday through Friday, for the duration of the eels’ migration, typically early May through July. After attending a training session, volunteers can sign up online for eel monitoring shifts. A typical shift consists of two to three volunteers working together to remove eels from the instream trap where they’ve been held since the last monitoring shift, count them, measure them, and note their coloration, and then release them to continue their migration upstream.

Time Frame: Trained eel monitoring volunteers are able to sign up to fill daily eel monitoring shifts. A typical shift lasts 1-2.5 hours, and volunteers can sign up for as many or as few shifts as they’d like.

Project Impacts: Data from the eel monitoring program go directly to the NH Fish and Game Department and are integrated with a nation-wide American Eel monitoring database used to improve management of the species.

Qualifications: Interest in handling eels!


  • Meet people from your community with similar interests
  • Opportunity to handle and learn about a fascinating, lesser-known critter in New Hampshire's rivers and estuaries
  • Contribute to a long-term dataset used to improve management of the American Eel population

Questions? For more information or if you want to join the eel monitoring team, contact Wells .


Upcoming Opportunities: Join our eel monitoring effort!

The 2018 eel monitoring season wrapped up in June. Sign up for our newsletter or contact Wells if you want to get involved in 2019, and check our eel monitoring project results page for the results of the 2018 season as soon as they're available.


Learn More: Links, resources, and partner organizations

You can learn all about this fascinating creature here, and check out this article in the New York Times about a similar volunteer eel monitoring program in New York. And make sure to watch the video below, filmed while monitoring eels out with the Coastal Research Volunteers on the Oyster River.


Volunteer Resources

Eel Monitoring Methods



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