Red-bellied Pacu

The Red-bellied Pacu is often sold as a "vegetarian piranha" due to its close resemblance to the red-bellied piranha, but this gentle giant grows vastly larger and has flat, molar-like teeth designed for crushing seeds and nuts rather than slicing flesh. Native to the Amazon basin, it can grow to over 60 centimetres and exceed 25 kilograms. Despite its peaceful temperament, its enormous adult size makes it one of the most commonly surrendered aquarium fish worldwide.