Any crustacean of the family Astacidae, resembling the
   lobster, but smaller, and found in fresh waters. Crawfishes are
   esteemed very delicate food both in Europe and America. The North
   American species are numerous and mostly belong to the genus Cambarus.
   The blind crawfish of the Mammoth Cave is Cambarus pellucidus. The
   common European species is Astacus fluviatilis.