Grand River, Kitchener, Ontario, Canada Crayfish crawls over the Grand River camera lens at night

Grand River, Kitchener, Ontario, Canada Crayfish crawls in front of the Grand River camera before almost getting swept away by the current at night

Grand River, Kitchener, Ontario, Canada Crayfish lock claws and fight at night in the Grand River

Grand River, Kitchener, Ontario, Canada Crayfish fight each other while trying to avoid being swept away by the Grand River current at night

Crayfish approaches the Grand River camera with its claws raised before turning to fight another crayfish while struggling against a swift current at night

Grand River, Kitchener, Ontario, Canada Crayfish remains in front of the Grand River camera before crawling off at night