Red-bellied Pacu - (Piaractus brachypomus)

🐟 Red-Bellied Pacu – (Piaractus brachypomus) – Large South American Characin for Sale

The Red-Bellied Pacu (Piaractus brachypomus) is a massive, plant-eating relative of the piranha, native to the Amazon and Orinoco River Basins. Recognized by its deep, silver body and distinctive reddish-orange belly, the Pacu is a powerful, long-lived fish that can reach enormous sizes in captivity.

While juveniles are commonly sold in pet stores, the Red-Bellied Pacu is a species that 99% of aquarists cannot properly house for its entire life. A full-grown Pacu requires a 1,000+ gallon tank or indoor pond to live comfortably—keeping one for life in a 125-gallon aquarium is not fair to the fish. Unfortunately, many outgrow their tanks, leading to poor health, stunted growth, or surrender. The same is true for the Black Pacu and other large Colossoma/Piaractus species.

Although they resemble piranhas, Pacus are primarily herbivorous and best suited only for extremely large, custom-built aquariums or ponds with strong filtration and significant swimming space.

🔎 Quick Facts – Red-Bellied Pacu (Piaractus brachypomus)

• 📛 Common Names: Red-Bellied Pacu, Giant Pacu, Vegetarian Piranha
• 🔬 Scientific Name: Piaractus brachypomus
• 🌍 Origin: Amazon & Orinoco River Basins, South America
• 🎨 Appearance: Deep-bodied, silver-gray with a red to orange belly; juveniles often have faint spots
• 📏 Max Size: 30–36 inches (76–91 cm)
• 💎 Availability: Widely available; mostly captive-bred

😇 Behavior & Temperament

• 🤝 Generally peaceful but may eat smaller fish due to size, not aggression
• 🐟 Best kept with other large, robust species
• 🧠 Intelligent and aware of surroundings
• 🌊 Requires massive open swimming space

🏠 Aquarium & Tank Requirements

• 📦 Minimum Tank Size: 1,000+ gallons (indoor pond recommended for adults)
• 🌿 Large open swimming areas with some driftwood and sturdy plants
• 🪵 Strong filtration due to heavy waste production
• 💡 Moderate lighting
• 🌊 Moderate water flow with high oxygen levels

💧 Water Parameters – Red-Bellied Pacu Care

• 🌡️ Temperature: 72–82°F (22–28°C)
• ⚗️ pH: 6.5–7.5
• 💧 Hardness: Soft to moderately hard water

🍽️ Diet – Primarily Herbivorous

• 🌿 Leafy greens, vegetables, and fruits (zucchini, lettuce, spinach, peas, grapes)
• 🌾 High-quality herbivore pellets
• 🥜 Nuts (in moderation) and seeds
• 🦐 Occasional protein sources like shrimp or insects

📋 Red-Bellied Pacu Care Overview Table

✨ Highlight:

• The Red-Bellied Pacu is not a fish for the average aquarist. While beautiful and intelligent, it grows far too large for standard home aquariums and should only be kept by those with public-aquarium-sized facilities that can provide for its needs throughout its life.