Alewife and blueback herring serve vital roles in ocean and river ecosystems. That’s why we’ve teamed up to conserve these fish, known collectively as river herring. You can help!

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What Are River Herring?

What Are River Herring?

Blueback herring and alewife are two closely related fish that live in the ocean as adults and migrate up rivers to spawn. Their numbers have declined in many places, spurring efforts to conserve and restore them.
Population Trends

Population Trends

Dams, fishing, and other factors have caused river herring to plummet from their historical numbers. While their numbers are still low, they have begun to rebound in some places, giving hope for future recovery.
Management & Monitoring

Management & Monitoring

Local citizens and the staff of government agencies work together to monitor the number of river herring in rivers from Maine to South Carolina. Steps to conserve and restore the fish are being planned and put into practice.

Got 5 Minutes? Do a Video Fish Count!

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Keeping track of river herring numbers is important for conservation and management. Video cameras at fish ladders record river herring as they swim up rivers along the East Coast. Scientists need your help counting the fish on the videos.

Do a Video Fish Count