Red swamp crayfish

Procambarus clarkii, known variously as the red swamp crayfish, Louisiana crawfish or mudbug, is a species of cambarid crayfish native to freshwater bodies of northern Mexico, and southern and southeastern United States, but also introduced elsewhere (both in North America and other continents), where it is often an invasive pest.

Main Photo Credit:
"Red swamp crayfish (Procambarus clarkii), Ontario, Canada" by Dr. Premek Hamr, 2025. CC BY-NC 2.0.

Description: Wikipedia