: Native to the Ohio River Basin, this aggressive species is easily identified by rusty-red spots on each side of its shell and black bands on its claw tips. Ecological Role and Impact

: Native to the Gulf Coast and Mississippi River drainage, it is typically dark red with elongated claws and is widely farmed for food (crawfish boils).

While there are over 350 species of crayfish in North America, three are frequently discussed due to their ecological impact and wide distribution:

: Native to western North America, it is distinguished by a white or pale blue-green patch at the claw hinge. It can grow up to 16–20 cm and live for 20 years.

In their native habitats, American crayfish are central to the food web: Learn About the American Crayfish! ~4k