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Phase I Luteus Pleco/Golden Sailfin Pleco - (Hypostomus Luteus) Argentina

Phase I Luteus Pleco/Golden Sailfin Pleco - (Hypostomus Luteus) Argentina

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Phase I Luteus Pleco/Golden Sailfin Pleco - (Hypostomus Luteus) Argentina
Fish Details, Description and Information Below:

🐟 Phase I Luteus Pleco / Golden Sailfin Pleco – (Hypostomus luteus) – Argentina – South American Pleco for Sale

The Phase I Luteus Pleco, also called the Golden Sailfin Pleco, (Hypostomus luteus) is a spectacular South American pleco that captivates aquarists with its vivid golden-yellow coloration and elegant sail-like dorsal fin.

Native to the Uruguay River Basin in Argentina, this pleco is famous for its mysterious three-phase color transformation:

  • Phase I: Darker, more subdued tones with yellow highlights
  • Phase II: Brilliant golden body with enhanced vibrancy—often considered the “sweet spot” of beauty and contrast
  • Phase III: Deep, rich golden coloration with uniform brightness

What makes Hypostomus luteus truly fascinating is that these phases are not tied to size or age—a Luteus can be in any phase at almost any size, and nobody knows exactly when or why they change. This unpredictability adds to their allure for collectors.


🔎 Quick Facts – Phase II Luteus Pleco

  • 📛 Common Name: Luteus Pleco, Golden Sailfin Pleco
  • 🔬 Scientific Name: Hypostomus luteus
  • 🌍 Origin: Argentina – Uruguay River Basin
  • 🎨 Appearance: Vibrant golden-yellow body with strong dorsal fin structure
  • 📏 Max Size: 12–14 inches (30–35 cm)
  • 💎 Availability: Premium South American pleco for sale

😇 Behavior & Temperament

  • 🤝 Peaceful with similarly sized fish
  • 🌊 Enjoys strong water flow and oxygenation
  • 🪵 Prefers driftwood, caves, and rocky structures for resting
  • 🍽️ Actively grazes on algae but requires supplemental feeding

🏠 Tank Requirements – Phase I Luteus Pleco Care

  • 📦 Minimum Tank Size: 75+ gallons
  • 🌊 River-style setup with moderate to strong current
  • 🪵 Include rocks, caves, and driftwood for security
  • 💧 Keep water clean with strong filtration

💧 Water Parameters

  • 🌡️ Temperature: 75–82°F (24–28°C)
  • ⚗️ pH: 6.5–7.8
  • 💧 Water Hardness: Soft to moderately hard

🍽️ Diet (Omnivorous)

  • 🌿 Vegetables: zucchini, cucumber, spinach
  • 💊 Spirulina-based wafers and sinking algae pellets
  • 🍤 Occasional protein: shrimp, bloodworms, carnivore pellets

🔍 Sexing

  • Males tend to have more pronounced odontodes
  • Females have a rounder body when carrying eggs

📋 Overview Table – Phase I Luteus Pleco Care

Feature Details
🌍 Origin Argentina – Uruguay River Basin
📏 Max Size 12–14 inches (30–35 cm)
😇 Temperament Peaceful to semi-territorial
🏠 Tank Size 75+ gallons
⚗️ pH Range 6.5–7.8
🌡️ Temp 75–82°F (24–28°C)
🍽️ Diet Omnivorous – vegetables, algae, protein
🎯 Ideal For Large aquariums, advanced pleco collectors

✨ Highlight:
The Phase II Luteus Pleco represents the stunning middle stage of the Luteus transformation, offering bright golden tones that make it one of the most visually striking plecos in the hobby. Its unpredictable phase-changing mystery makes every specimen truly unique.

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