Cousins and long-time business partners Jeff and Mark Nelson have immersed themselves in aquaculture. They're growing fish in a part of the country where pork is king. They've converted a former hog confinement building into a farm-raised fish venture called Iowa's First. They have eighteen, ten thousand gallon tanks filled with hybrid bass which they ship to restaurants all over the country. The Nelsons are also experimenting with growing shrimp.