Why are states unleashing millions of these fish?
Every year, federal and state wildlife agencies in the US breed millions of fish and release them into the wild, all for fishers to catch. They do this because many ecosystems no longer support the thriving fish populations they once did, due to dams, pollution, and rising water temperatures.But there’s a catch. In many cases, the fish that are being released aren’t native to these ecosystems. In Connecticut, where this video was filmed, the Department of Energy and Environmental Protection (DEEP) breeds and releases rainbow trout — from the West Coast — and brown trout, from Europe, Asia, and Northern Africa. Of course, states aren’t just throwing fish into the water at random. There are many preventative measures and monitoring systems in place to protect local ecosystems from the dangers of non-native species. But things can still go wrong.
Introducing non-native fish can wreak havoc on an ecosystem. So why are state wildlife agencies doing it by the million?
To see some fish stocking in action and learn more about the process, Vox producer Nate Krieger went on a fish stocking run with employees of Connecticut DEEP. In just under an hour, they released 675 live trout into the Mianus River for the recreation of local fishermen.
This video examines the strange paradox that incentivizes states to do something that, at least in some cases, hurts the very ecosystem they're trying to conserve. It explores the complicated question of fish stocking in the US, examines the possible dangers to ecosystems, and shines a light on potential conservation benefits. Because recreational fishing encourages people to spend time outside, which builds a relationship with nature and the environment that could be invaluable for our future.
Read more about non-native fish stocking:
Benji Jones’ article on non-native fish stocking: https://www.vox.com/climate/483175/fish-stocking-trout-wildlife-agencies
Connecticut DEEP’s report on fish stocking for 2026: portal.ct.gov/-/media/DEEP/fishing/weekly_reports/CurrentStockingReport.pdf
Apportionments data for hunting and fishing, broken down by category and state: partnerwithapayer.org/funding-sources/
“Wilderness Fish Stocking: History and Perspective” by Edwin P. Pister: www.jstor.org/stable/3658925?mag=fish-stocking-the-dark-underbelly-of-resource-management
Information and great photos on “fish cars,” the train cars full of live fish that powered fish stocking in the 1800s: pullman-museum.org/pshs/pshsCompoundObjectWebPage.php?collection=pshs&pointer=18283&root=18286
This video is part of a series supported by Animal Charity Evaluators, which received a grant from EarthShare.
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