Yellow Flagtail Prochilodus - (Semaprochilodus insignis)

🐟 Yellow Flagtail Prochilodus - (Semaprochilodus insignis) – Active and Colorful South American Schooling Fish

The Yellow Flagtail Prochilodus (Semaprochilodus insignis) is a beautiful, active, and strong-swimming freshwater species found in the Amazon and Orinoco river basins. Recognized for its silver body, black vertical stripes, and striking yellow-and-black “flag-like” tail fin, this fish brings movement and color to large aquariums.

In the wild, they are migratory fish, often traveling in large schools. In captivity, they do best when kept in groups of 5 or more and require ample swimming space. They are hardy, adaptable, and often kept with other large South American fish in community setups.

🔎 Quick Facts – Yellow Flagtail Prochilodus

• 📛 Common Name: Yellow Flagtail Prochilodus, Flag-tailed Prochilodus
• 🔬 Scientific Name: Semaprochilodus insignis
• 🌍 Origin: Amazon & Orinoco River Basins, South America
• 🎨 Appearance: Silver body, black vertical stripes, vivid yellow-and-black tail fin
• 📏 Max Size: 14–16 inches (35–40 cm)
• 💎 Availability: Common in the trade; prized for activity and beauty

😇 Behavior & Temperament

• 🤝 Peaceful, active schooling fish
• 🐟 Best kept in groups of 5+
• 🌊 Constant swimmers; require long tanks for movement

🏠 Aquarium & Tank Requirements

• 📦 Minimum Tank Size: 125+ gallons
• 🪵 Open swimming areas with driftwood and rocks on the perimeter
• 🌿 Hardy plants or artificial decor (may graze on soft plants)
• 💡 Moderate lighting to enhance silver and yellow tones

💧 Water Parameters

• 🌡️ Temperature: 75–82°F (24–28°C)
• ⚗️ pH: 6.0–7.5
• 💧 Hardness: Soft to moderately hard

🍽️ Diet – Omnivorous

• 🌿 Algae wafers, spirulina-based pellets
• 🥬 Vegetables like blanched spinach and zucchini
• 🦐 Occasional frozen foods like bloodworms or brine shrimp

📋 Overview Table

✨ Highlight:
The Yellow Flagtail Prochilodus is a stunning and active schooling fish that adds constant movement and a splash of color to large aquariums, thriving best when kept in groups with plenty of swimming space.