Signal crayfish

The signal crayfish is a freshwater crustacean with a home base in western North America, particularly around the Columbia River Basin. These clawed critters are easily recognized by the pale blue or white patches near their pincers, which look like little flags or signals.

• Native to the Columbia River Basin in western North America.
• Identifiable by pale blue or white patches near their claws.
• Belongs to the Astacidae family of freshwater crayfish.