User blog comment:Fliu/Chapter 969 Wano Wars: Revenge of the Kurozumi Clan/@comment-25161930-20200127060710/@comment-3507581-20200221164858

Remember that when a Devil Fruit user dies, the fruit reincarnates into another fruit of similar shape. Maybe both fruits only found their new incarnations in East Blue, which implies their shapes are unusual in the Grand Line.