On two occasions in 2025, a Chinese mitten crab, a prohibited species in Oregon, was found in the Willamette River near the Sellwood Bridge. The Oregon Department of Fish & Wildlife (ODFW) is seeking help identifying the origin of the crabs.

Tidings Data Snapshot Chinese Mitten Crab: Oregon Finds and West Coast Warning Signs

2 Confirmed Oregon finds in 2025 Apr 22 First confirmed Oregon capture – Lower Columbia River Nov 17 Second confirmed capture – Willamette River near Sellwood Bridge 100,000-800,000 Estimated annual SF Bay population peak in 1998-2000

Source: ODFW 2025 mitten crab releases and Smithsonian Invasion History

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Non-Native Chinese Mitten Crabs Found In The Willamette River

A Chinese mitten crab was found in Oregon waters in April 2025 at

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