A second invasive Chinese mitten crab was found in Oregon’s Willamette River last month, raising concerns for local officials over its potential appearance in Washington.

The Chinese mitten crab was caught on Nov. 18 and is prohibited in both Washington and Oregon, according to the Washington Department of Fish & Wildlife (WDFW).

Chinese mitten crabs spend most of their lives in freshwater, but reproduce in saltwater. Some of its burrowing habits can cause significant damage to dikes, levees, and stream banks through increased erosion.

The invasive crab can also carry harmful pathogens and tends to eat and outcompete native species, including clams, mussels, and fish eggs.

The Washington Invasive Species Council (WISC) also noted that the Chinese mitten crab may carry lung flukes, wh

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