Piranha

D&D 2024 monster: Piranha. Source: Plane Shift: Ixalan. challenge rating 0, creature type Beast, Tiny size, speed swim 40 ft. The waters of the Great River and all its tributaries are home to fish that serve as one of the most important food sources for other animals in the forest. These include large predatory fish, as well as churning swarms of small biting fish such as piranhas. Beast Tiny swim 40 ft.