Procambarus zonangulus, the white river crawfish, white river crayfish or southern white river crayfish, is a species of freshwater crayfish. It is a distinct but closely related species from Procambarus acutus, which is also known as white river crayfish and has a wider range.

Crayfish are freshwater crustaceans belonging to the infraorder Astacidea, which also contains lobsters. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. Some species are found in brooks and streams, where fresh water is running, while others thrive in swamps, ditches, and paddy fields. Most crayfish cannot tolerate polluted water, although some species, such as Procambarus clarkii, are hardier. Crayfish feed on animals and plants, either living or decomposing, and detritus.