Taxonomy
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Siluriformes
- Family
- Serrasalmidae
- Genus
- Piaractus
- Species
- mesopotamicus
Habitat
Pacu primarily inhabit large rivers, floodplains, and lakes in the Paraná and Paraguay basins of South America, including areas in Brazil, Paraguay, Bolivia, and Argentina. They prefer warm, freshwater environments with slow-moving currents and abundant vegetation for cover and food. These fish are often found in both main river channels and connected backwaters.
Diet
Pacu are primarily herbivorous, feeding on fruits, seeds, nuts, and aquatic plants that fall into the water. They also consume insects, snails, and small crustaceans, using their powerful jaws to crush hard items. Feeding activity peaks during the day when they actively forage in shallow waters.
Behavior
Pacu are schooling fish that form groups to enhance protection and foraging efficiency. They are diurnal, most active during the day, and exhibit territorial behavior around feeding sites, especially during spawning migrations. These fish are known for their strong swimming capabilities and can jump out of water when startled.
Fishing
Anglers targeting Caranha pacu, a popular sport fish in South America's Paraná and Paraguay river basins, should focus on bottom fishing techniques using baits that mimic their herbivorous diet of fruits, seeds, and nuts for reliable strikes. Use medium-heavy rods with strong reels spooled with 20-30 lb test line, size 2/0 hooks, and sinkers to hold bait in place, ensuring you can handle their powerful runs and jumps. Effective baits and lures include natural options like corn, bananas, or nuts, as well as soft plastic imitations or vibrating lures that attract their daytime foraging behavior. The best season is during the rainy months from October to March, with peak activity in the early morning to late afternoon when they actively feed in shallow, vegetated waters. Target pacu in warm, slow-moving freshwater habitats such as large rivers, floodplains, and lakes with abundant cover in countries like Brazil, Paraguay, Bolivia, and Argentina, focusing on areas with fallen fruits and vegetation. Record sizes include typical lengths of 50-70 cm, with the IGFA all-tackle record for pacu species reaching up to 88 pounds, though for Piaractus mesopotamicus, notable catches hit up to 1.1 meters and 22 lbs 8 oz. Conservation-wise, angler-funded programs in these regions promote sustainable practices like catch-and-release and regulated seasons, which help maintain stable populations and protect vital waterways, demonstrating how recreational fishing supports aquatic habitat restoration and biodiversity.
Conservation Status
Listed as Not Evaluated by IUCN.