In the wild, the natural hybrids are not common, but certainly do occur. They often show up in a water body that has a lot of one crappie species, and few of the other species. I saw a strong year class of them in a public lake I worked on in Kansas a long time ago. It had black crappies, and we rarely saw a white crappie. Suddenly, here was this abundant group of hybrids one year.
Anglers sure didn't care!