It’s crayfish season in Louisiana, but the Pacific Northwest is receiving all the crayfish spotlight. Researchers recently discovered two new species of the crustaceans: the Okanagan crayfish and the ...

Juan Mateo Rivera looking for crabs in a stream in Assis, Acre State, Brazil in 2022. In Manizales, perched in the Colombian Andes, researchers are studying how a native species of small fresh-water ...

Of the 500-plus species of crayfish that exist worldwide, more than 300 varieties inhabit the rivers, lakes, and bayous of the southeastern United States, where they are colloquially called crawfish.

Nearly a quarter of the world's freshwater species are at risk of extinction, according to new research. A detailed extinction assessment of more than 23,000 species of freshwater fauna by the ...

Colombian biologist Ada Acevedo-Alonso is educating communities about an invasive crayfish species while also studying the freshwater creature's distribution and impacts on the environment. The ...

Scientists discover a rare gynandromorph crab in Silent Valley exhibiting both male and female traits. Read the full research findings on this unique discovery.

Increased salinity usually spells trouble for freshwater insects like mayflies. A new study finds that the lack of metabolic responses to salinity may explain why some freshwater insects often ...