Bruch said he can't recall two being harvested on the same day before. Only 13 percent of spearers catch any sturgeon at all.
Tuesday's catches came on Lake Winnebago's eastern shore.
Joseph Gerbyshak, 24, caught one white sturgeon, and 54-year-old Sue Muetzelburg of Fond du Lac nabbed the other.
Muetzelburg said her first thought was that the pale fish was sick. She plans to mount the head and fillet and smoke the rest.