In the frying pan they all look alike. On the water you can do like Jimmy Houston. Just kiss it. If she kisses you back then that crappie is a girl crappie. In all seriousness, I believe it has something to do with the spawn to be able to tell.
For most of the year, male and female crappie fish look exactly alike. However, just before spawning, changes take place in their bodies and their behaviors that can help you identify the different genders in these fish. Observe crappie behavior in early spring. Some fish will be building nests, moving small pieces of soot, gravel or vegetation into areas to form a protective home for eggs. The builders are male crappie fish; fish without such a purpose are the females. Observe the coloring on the crappie fish just before spawning. Male crappie fish turn almost completely black on their fins and undersides, while females do not change colors. Go to this post on the forum for more information. http://www.crappie.com/crappie/louis...k-crappie.html