Crawfish are a popular forage for bass and other gamfish. As such, lures that mimic the appearance and movement of crawfish can be very effective when bass fishing. One type of lure that is commonly used to imitate crawfish is the crankbait.
Crankbaits come in a variety of colors and patterns. The four most popular patterns for mimicking crawfish are the natural green and brown crawfish, red crawfish, and chartreuse crawfish. Often times these main color patterns will have either an orange, red, or chartruese underside to enhance the color contrast and trigger bass into striking.
The most common natural patterns are brown or green. These two colors typically mimic the color of a live crawfish in most waters at different times of the year. This pattern can be very effective in clear water or when trying to "match the hatch" when bass are feeding on crawfish in your lakes, ponds, and rivers.