Crustaceans are among the most be-haviorally complex invertebrates. They usea variety of signals to communicate witheach other. Many of these signals involvespecial body postures or movements of thelegs and antennae. This type of communi-cation has been shown to be very impor-tant in settling disputes between neighborsand in courtship. Courtship behavior canbe especially elaborate (see “Fiddler on theMud,” p.269)