This invader is eating through Colorado’s rivers, and it could wipe out native fish and plants if left unchecked.

The emergence has caused concern among state wildlife officials. Officials issue urgent warning after alarming river ...

University researchers discovered two new crayfish species in the Pacific Northwest, now threatened by invasive species.

Recently, researchers at the University of Illinois Urbana-Champaign turned their attention back to the Signal Crayfish’s homeland and made a remarkable discovery. Their study identified two new ...

Two Missouri crayfish species may be listed as 'threatened' under Endangered Species Act Sep 21, 2020 Brightly colored creature—kept in pet aquariums globally—discovered as new species ...

The Okanagan Crayfish (Pacifastacus okanaganensis) has been newly described from interior British Columbia and Washington State. Another new species, the Misfortunate Crayfish (Pacifastacus ...

A new species of crayfish found in Washington and Canada has been identified, researchers said. Getty Images/iStockphoto A graduate student came across a reddish-brown creature with claws that was ...

Rusty crayfish, an aquatic nuisance and an invasive species, has been discovered in a Larimer County river south of Estes Park, according to Colorado Parks and Wildlife. This is the first time the ...

Rusty crayfish, an invasive species, has been discovered in the Little Thompson River in Larimer County, Colorado. This aggressive crayfish, known for its big appetite and rapid reproduction ...