Ushi Ushi no Mi, Model: Bison

Once Eaten You Will Be Able To Turn Into A Bison. The Ushi Ushi No Mi (Ox-Ox Fruit) is a Zoan type devil fruit that has the appearance of a blue pear with many, many swirls.

Who owns this Devil Fruit
The owner of the Ushi Ushi No Mi is Dalton who was first mentioned in Anime: Episode 79 or Manga: Chapter 132.

What Arc Is It In?
The Ushi Ushi No Mi (Ox-Ox Fruit) was featured in the Drum Island Arc.