Difference between Crayfish and Crawdad

What is the difference between Crayfish and Crawdad?

Crayfish as a noun is a freshwater crustacean (cambaridae) resembling a small lobster, sometimes used as an inexpensive seafood or as fish bait. while Crawdad as a noun is (us regional) the crayfish.

We hope you now know whether to use Crayfish or Crawdad in your sentence.