Oregon has two new invasive species to deal with. For the first time in the western United States, scientists say two kinds of crayfish have appeared in streams and rivers. What makes this story ...

It sounds like something out of a sci-fi movie: a new crayfish population made entirely of asexually reproducing, all-female ...

The Colorado Division of Wildlife is urging extra caution from all those fond of a good old-fashioned crayfish boil, after discovering a particularly aggressive variety of the small crustacean in ...

Alabama already had more documented species of crayfish living in its waters than any other state, but that lead was padded this week as two biologists announced the discovery of a new species called ...

A Louisiana red swamp crayfish spreads its claws in a threat display. This crayfish was found in Fairfield, Ohio, hundreds of miles from its native range. A lazy summer day is a perfect time to head ...

No one knows exactly when the clones first appeared, but humans only became aware of them in the early 2000s. It was a German aquarium owner who first brought it to scientists’ attention. In 1995, he ...