The Center for Biological Diversity sued the Trump administration today for delaying critically needed Endangered Species Act ...

Researchers recently discovered two new crayfish species: the Okanagan crayfish and the misfortunate crayfish (Pacifastacus ...

Diver Masumi Palhof, technician with the Kodiak Soil and Water Conservation District, with a signal crayfish she nabbed in ...

Several illegal crayfish traps which could have been dangerous to other wildlife have been removed from a canal by officials.

This signal crayfish, a native of the Pacific Northwest, can grow up to 7 inches long and weigh as much as 4 ounces — about three times larger than native Minnesota crayfish, according to the DNR.

Invasive signal crayfish spotted in lake near Alexandria 00:20. ALEXANDRIA, Minn. — Wildlife experts are dealing with a new potential threat in Minnesota's waterways. The Minnesota Department of ...

Wildlife officials say signal crayfish were found in Lake Winona, which is near Alexandria, Minnesota. This is the first time they have been found in Minnesota waters. South Dakota keeps one-day ...

The crayfish could expand to 100% of the lakeshore within the next two years. Impacts on Crater Lake's clear water The newts aren't the only thing at risk at Crater Lake.

The crayfish have now become an existential threat to the endemic newt. The newts are a subspecies of the rough-skinned newt that lives across the Pacific Northwest.

The American signal crayfish, which can grow to lengths of up to 12 inches, has menacing claws, and a voracious appetite. The female of the species can carry up to 250 eggs.

The Signal Crayfish is native to the Pacific Northwest, but most of its research has investigated it as an invasive species. Studying the species in its native habitat unlocked a new layer of ...

Because both species were previously thought to be signal crayfish, the discovery comes as a surprise. These sneaky species required advanced genetic. It’s crayfish season in Louisiana, ...