Ancient Zoan is a sub-class of Zoan that allows users to transform into ancient animals, such as extinct dinosaurs, mammals and arachnids. Ancient Zoan Fruits are much rarer than regular Zoans and seem to augment the user’s raw physical abilities to a greater extent than standard Zoans. Nine Ancient Zoan powers have been revealed so far, most of which are dinosaurs. This leads me to believe that at this point Oda will continue to reveal more as the series continues. I believe the users will expand beyond the Beast Pirates as there are many more extinct animals to choose from. Below is a list of the eight potential Ancient Zoan Devil Fruits that have the best chance to appear before One Piece ends its run.

Ryu Ryu no Mi,
Model:
Velociraptor
(Dragon-Dragon Fruit, Model: Velociraptor)
Velociraptor is a carnivorous bipedal theropod dinosaur that lived during the latter part of the Cretaceous Period. A ferocious fanged and agile hunter. Velociraptor used it’s its retractable sickle shaped claw on its second toe as its primary weapon, slashing open the bellies of its prey. This fruit allows the user to transform in full or hybrid Velociraptor at will. As with other Ancient Zoans, this fruit’s transformation bestows greater strength and durability than regular Zoans. While in full Velociraptor form granted by this fruit the user gains animalistic strength, enhanced speed and agility, sharp teeth and claws, and a long tail. Being a carnivorous dinosaur, the Velociraptor is better adapted for combat than normal Zoans. Otherwise, the user is affected by the standard Devil Fruit weaknesses.

Ryu Ryu no Mi,
Model:
Ankylosaurus
(Dragon-Dragon Fruit, Model: Ankylosaurus)
Ankylosaurus is a quadrupedal herbivorous armored dinosaur that lived during the latter part of the Cretaceous Period. The largest-known ankylosaurid, Ankylosaurus is estimated to have been between 20-26 feet long and to have weighed between 5-8 metric tons. This fruit allows the user to transform in full or hybrid Ankylosaurus at will. As with other Ancient Zoans, this fruit’s transformation bestows greater strength and durability than regular Zoans. While in full Ankylosaurus form granted by this fruit the user gains animalistic strength, a broad, robust body, spiky armor-plated skin, horns, and a large club on the end of its tail that can be used as a weapon. However, the user is extremely heavy and slow in this form, leaving them unable to dodge high-speed attacks. Otherwise, the user is affected by the standard Devil Fruit weaknesses.

Ryu Ryu no Mi,
Model:
Stegosaurus
(Dragon-Dragon Fruit, Model: Stegosaurus)
Stegosaurus is a quadrupedal herbivorous armored dinosaur that lived during the latter part of the Jurassic Period. Ankylosaurus is estimated to have been 30 feet long and to have weighed between 5-8 metric tons. This fruit allows the user to transform in full or hybrid Stegosaurus at will. As with other Ancient Zoans, this fruit’s transformation bestows greater strength and durability than regular Zoans. While in full Stegosaurus form granted by this fruit the user gains animalistic strength, a large heavily built body, a double row of kite-shaped upright plates along their back and the two pairs of long spikes extending horizontally near the end of the tail that can be used as weapons. However, the user is extremely heavy and slow in this form, leaving them unable to dodge high-speed attacks. Otherwise, the user is affected by the standard Devil Fruit weaknesses.

Ryu Ryu no Mi,
Model:
Dilophosaurus
(Dragon-Dragon Fruit, Model: Dilophosaurus)
Dilophosaurus is a carnivorous bipedal theropod dinosaur that lived during the early part of the Jurassic Period. Dilophosaurus is estimated to have been 23 feet in length and weigh about 880 pounds. This fruit allows the user to transform in full or hybrid Dilophosaurus at will. As with other Ancient Zoans, this fruit’s transformation bestows greater strength and durability than regular Zoans. While in full Dilophosaurus form granted by this fruit the user gains animalistic strength, enhanced speed and agility, slender body, sharp curved serrated teeth and claws, and spit venom. Being a carnivorous dinosaur, the Dilophosaurus is better adapted for combat than normal Zoans. Otherwise, the user is affected by the standard Devil Fruit weaknesses.

Ryu Ryu no Mi,
Model:
Tyrannosaurus Rex
(Dragon-Dragon Fruit, Model: Tyrannosaurus
Rex)
Tyrannosaurus rex is a carnivorous bipedal theropod dinosaur that lived during the latter part of the Cretaceous Period. Tyrannosaurus rex is estimated to have been 40 feet in length, 30 feet tall and weigh between 6-8 metric tons. This fruit allows the user to transform in full or hybrid Tyrannosaurus rex at will. As with other Ancient Zoans, this fruit’s transformation bestows greater strength and durability than regular Zoans. While in full Tyrannosaurus rex form granted by this fruit the user gains animalistic strength, binocular vision, sharp teeth and claws, and a massive durable skull balanced by a long, heavy tail. Being a carnivorous dinosaur, the Tyrannosaurus rex is better adapted for combat than normal Zoans. However, in full Tyrannosaurus rex form, the user has proportionally smaller arms making it harder to grab enemies. Otherwise, the user is affected by the standard Devil Fruit weaknesses.

Ryu Ryu no Mi,
Model: Iguanadon
(Dragon-Dragon Fruit, Model: Iguanadon)
Iguanodon is a facultatively bipedal herbivorous dinosaur that lived during the late Jurassic and early Cretaceous Periods. Iguanodon is estimated to have been 33-43 feet long and to have weighed 3 metric tons. This fruit allows the user to transform in full or hybrid Iguanodon at will. As with other Ancient Zoans, this fruit’s transformation bestows greater strength and durability than regular Zoans. While in full Iguanodon form granted by this fruit the user gains animalistic strength, a large, bulky body, boney beak, and thumb spikes that can be used as weapons. Otherwise, the user is affected by the standard Devil Fruit weaknesses.

Ryu Ryu no Mi,
Model:
Parasaurolophus
(Dragon-Dragon Fruit, Model:
Parasaurolophus)
Parasaurolophus is a facultatively bipedal herbivorous ornithopod dinosaur that lived during the late Cretaceous Period. Parasaurolophus is estimated to have been 31 feet long and to have weighed 2.5 metric tons. This fruit allows the user to transform in full or hybrid Parasaurolophus at will. As with other Ancient Zoans, this fruit’s transformation bestows greater strength and durability than regular Zoans. While in full Parasaurolophus form granted by this fruit the user gains animalistic strength, a large, bulky body, boney beak, and sharp claws. Otherwise, the user is affected by the standard Devil Fruit weaknesses.

Ryu Ryu no Mi,
Model:
Saurophaganax
(Dragon-Dragon Fruit, Model: Saurophaganax)
Saurophaganax is a carnivorous bipedal theropod dinosaur that lived during the latter part of the Jurassic Period. Saurophaganax is estimated to have been 46 feet in length, and weigh between 2.3 metric tons. This fruit allows the user to transform in full or hybrid Saurophaganax at will. As with other Ancient Zoans, this fruit’s transformation bestows greater strength and durability than regular Zoans. While in full Saurophaganax form granted by this fruit the user gains animalistic strength, enhanced speed and agility, horns, sharp serrated teeth, claws, and a long powerful tail. Being a carnivorous dinosaur, the Saurophaganax is better adapted for combat than normal Zoans. Otherwise, the user is affected by the standard Devil Fruit weaknesses. The fruit is very similar to the Ryu Ryu no Mi, Model: Allosaurus with only slight differences between appearances.
Ancient Zoans are some of the most interesting Devil Fruits Oda has introduced in One Piece. Although, it would be nice if he introduced Plantae Zoans at some point. As with other Zoan Devil Fruits plants can fall into each subcategory; Mythical (Jubokko), Ancient (Archaeamphora longicervia), and Carnivorous (Pinguicula conzattii). Only time will tell.
What other Ancient Zoan Devil Fruits do you think we’ll see in One Piece? What do you think of my list? Leave your comments below!