Some aquatic invasive species, such as the European green crab and zebra/quagga mussels, can have dramatic impacts on ecosystems, outdoor recreation, and the economy.
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European green crab
Green crab pose a threat to Washington's native shellfish, which are important for recreational and commercial harvest as well as to the shellfish aquaculture industry, and native estuary ecosystems.
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Zebra & quagga mussels
These species could cost taxpayers hundreds of millions of dollars a year and close down access to state waters for recreation and commercial opportunities.
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Northern pike
Northern Pike are a highly invasive predator that is a serious threat to other fish species. Their voracious appetite for other fish and prolific spawning could cause great ecological and economic damage.