Invasive Chinese Mitten Crab Discovered in Pacific Northwest

A fisherman in the Pacific Northwest recently caught an unexpected species—the Chinese mitten crab, marking the first time it has been found in the region. This invasive crab, native to eastern Asia, poses a serious threat to local ecosystems and the fishing industry.

What Is the Chinese Mitten Crab?
Recognizable by its hairy, mitten-like claws, this crab thrives in both saltwater and freshwater. Its ability to adapt, coupled with its appetite for plants and animals, allows it to outcompete native species and damage habitats. It can grow up to four inches wide and is known to burrow, causing harm to riverbanks and infrastructure.

The Discovery and Concerns
The crab was caught on April 22 near Astoria, Oregon, in the Columbia River. Experts suspect it may have arrived via ship ballast water or was illegally released. Its appearance has raised alarms among scientists and prompted collaboration between Oregon, Washington, and NOAA to assess the situation.