The image shown is a representative illustration and does not depict every individual animal in this category.
Total number of species approx.: 600
Freshwater crayfish are robust crustaceans found in rivers, lakes, streams, and wetlands across many continents. With strong claws and a hard exoskeleton, they are well equipped for defense and feeding. Crayfish spend much of their time on the bottom, hiding under rocks or within burrows along riverbanks.
As omnivores, freshwater crayfish feed on plants, insects, small fish, and decaying organic matter, helping recycle nutrients within freshwater systems. Their burrowing activity shapes riverbeds and provides shelter for other aquatic organisms. While vital to many ecosystems, some crayfish species have become invasive, highlighting their powerful influence on freshwater environments.
