I'm pretty sure HSB are okay in Iowa, as I've seen posting on PB forum from other "I-wegians" who have HSB in their ponds. But I might message one of them to confirm this is true.
Yes, Dr Luke, HSB are legal in IA. The approved species list in Iowa saye White Bass, and their hybrids as well as Striped bass, and their hybrids...
It was the LACK of the "and their hybrids" language being included concerning white and black crappie that made a "special" permit needed to stock hybrid crappie in Iowa
