The Ryu Ryu no Mi, Model: Spinosaurus is an Ancient Zoan-type Devil Fruit eaten by Page One, a Tobiroppo member of the Beast Pirates. This fruit allows the user to transform into a Spinosaurus or hybrid form.

Page One uses this Devil Fruit to gain massive physical strength, extreme durability, and high endurance, traits common to Ancient Zoans. His Spinosaurus form is primarily used for direct combat and pursuit, withstanding heavy damage while continuing to fight.

This Devil Fruit is featured prominently during the Wano Country Arc.