Learn about this year’s herring numbers and our hopes for growing the Mystic herring population with the Horn Pond fish passage project

Check out our insights from five years of online herring counting!

Herring are beginning their annual migration up the Mystic River to spawn. Curious about where they’re coming from? Check out this guest blog by MyRWA volunteer, Lucy Kates!

Learn about river herring in the Mystic River with MyRWA Watershed Scientist, Andy Hrycyna and Ben Gahagan, Diadromous Fish Biologist with the Massachusetts Division of Marine Fisheries!

Read about how 1,000 Mystic river herring were moved to the Ipswich.

Read about how the counting works online.

Read about the new fish passage improvements coming to Horn Pond.

See the 2020 numbers and the science behind it.

Read why our top leaderboard counters do what they do. Photo: Jim Renault

An urban ecological success story!

Miss counting fish…find out what you can do instead.

Read about the 2019 herring numbers in the Mystic River.

Guest blogger Lauren Fitzgerald introduces herself and dives into the natural history of Horn Pond.

How does temperature impact the migration?

Eel in the Mystic! Where do they come from? Photo credit: David Mussina

Natural beauty is not out of reach even in the most urban of spaces. Each spring hundreds of thousands of river herring swim up the Mystic River to the Mystic Lakes—participate in the spectacular migration by counting fish online or in person! Original Article on Discover Magazine

Read on for the final estimate for the 2018 herring run.

Why are the video and in-person population estimates different?