Grand Canyon researchers are sounding the alarm after invasive crayfish numbers climbed sharply downstream of the Glen Canyon Dam, with worries that the species could reach some of the Southwest's ...

Crayfish are the latest non-native species invading the Colorado River below Glen Canyon Dam, threatening to spread into the Grand Canyon. The species has proliferated around the West, causing ...

So you love lobster but your wallet doesn’t? Relax. With a little work and exercise, you can bring home for free a catch that tastes like lobster. Arizona’s lakes and streams are full of crayfish — a ...