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Invasive bass discovered in Grand Canyon NP; threat to native chub

DENVER (AP) — For National Park Service fisheries biologist Jeff Arnold, it was a moment he’d been dreading. Bare-legged in sandals, he was pulling in a net in a shallow backwater of the lower Colorado River last week, when he spotted three young fish that didn’t belong there. “Give me a call when you get this!” he messaged a colleague, snapping photos.


Minutes later, the park service confirmed their worst fear: smallmouth bass had in fact been found and were likely reproducing in the Colorado River below Glen Canyon Dam.


https://www.usnews.com/news/news/articles/2022-07-06/biologists-fears-confirmed-on-the-lower-colorado-river

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