CLARKSBURG, W.Va. (WBOY) — Almost any species of crayfish can have a mutation that occasionally makes them blue, but West Virginia has four distinct species that are almost always blue.

Native to prairies and grasslands, this species gets its name from living in empty crawfish (also called crayfish or crawdad) burrows, although at times it may use burrows created by other animals.

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 ...

DENVER (KDVR) — An aggressive aquatic nuisance species was found in a northeastern Colorado river. According to Colorado Parks and Wildlife, rusty crayfish have been located in the West Fork ...

ST. LOUIS, Mo.— Following litigation by the Center for Biological Diversity, the U.S. Fish and Wildlife Service today protected the Big Creek and St. Francis River crayfish as threatened under the ...