User blog comment:Sararew1/BlackBeards First Devil Fruit/@comment-25400375-20170526153648/@comment-25400375-20170531010109

That depends if he didn't have a spare fruit for the power to go into at the time in hiding. But, to be honest, I first thought what Teach did was something science-related. I know it's all just speculation, but I'm hopeful we'll have an answer someday.