The pacu chico is a fish native to the fresh waters of South America, mainly the Amazonian rivers. It is of tropical habitat, preferring waters between 22 and 28 °C. It is an omnivorous fish that also feeds on fruits, plants, algae and seeds. They have a highly developed sense of smell and are attracted by the smell of animal fat, males develop a larger dorsal fin and are more colorful, females are larger than males and more robust and rounded constitution. They can weigh up to 55 pounds (25 kg). They have a strong dentition reminiscent of human teeth, teeth that can cause serious injuries despite their small size (20 cm maximum).