It's been a while since we've had some fun invasive species news here at the BlahStuff... Exotic crabs in waterway invasion
Mitten crabs were first brought into Europe in ships' ballast water.
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They survive in both sea and fresh water, prey on protected native species, such as white-clawed crayfish and salmon eggs, and can destabilise river banks by burrowing into them.
Good find, Matt.