Crayfish begin moving about in early spring, and they quickly become the main entrÂ¿Â¿e on a bass' menu. When you hop a jig-and-pig slowly over the bottom, it mimics their backward darting movement. The flopping legs of the pork trailer-my favorite is Uncle Josh's No. 11 Pork Frog-give the appearance of crayfish pincers. Sluggish, coldwater bass have ample time to respond and often do.