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Undecimalis-Pterygoplichthys - (Pterygoplichthys undecimalis)

Undecimalis-Pterygoplichthys - (Pterygoplichthys undecimalis)

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Undecimalis-Pterygoplichthys - (Pterygoplichthys undecimalis)
Fish Details, Description and Information Below:

🐟 Undecimalis Pleco – (Pterygoplichthys undecimalis) – Large South American Algae-Eating Pleco

The Undecimalis Pleco (Pterygoplichthys undecimalis) is a large, hardy freshwater pleco species native to rivers and floodplain systems of South America. Known for its tall dorsal fin with 11 or more rays, striking reticulated pattern, and strong algae-grazing ability, this species is both beautiful and functional in large aquariums or ponds. As a member of the Pterygoplichthys genus, it grows significantly larger than common Ancistrus species, making it best suited for experienced aquarists with spacious setups.


🔎 Quick Facts – Undecimalis Pleco (Pterygoplichthys undecimalis)

  • 📛 Common Name: Undecimalis Pleco
  • 🔬 Scientific Name: Pterygoplichthys undecimalis
  • 🌍 Origin: South America – Amazon and Orinoco River Basins
  • 🎨 Appearance: Dark body with lighter reticulated pattern; tall dorsal fin with 11+ rays
  • 📏 Max Size: 18–20 inches (45–50 cm)
  • 💎 Availability: Occasionally available; valued for algae control and unique markings

😇 Behavior & Temperament

  • 🤝 Peaceful, compatible with most medium-to-large tankmates
  • 🪵 Requires plenty of space for movement
  • 🌿 Strong algae grazer but also needs supplemental feeding

🏠 Aquarium & Tank Requirements

  • 📦 Minimum Tank Size: 125+ gallons
  • 🪵 Provide driftwood, large rocks, and hiding spots
  • 🌊 Strong filtration to handle heavy bio-load
  • 💡 Moderate lighting to encourage algae growth for grazing

💧 Water Parameters – Undecimalis Pleco Care

  • 🌡️ Temperature: 74–82°F (23–28°C)
  • ⚗️ pH: 6.5–7.8
  • 💧 Hardness: Soft to moderately hard water

🍽️ Diet – Omnivorous with Herbivorous Preference

  • 🌿 Algae wafers and fresh vegetables (zucchini, cucumber, spinach)
  • 🐟 Occasional protein foods such as shrimp or bloodworms
  • 🪵 Benefits from driftwood as part of natural diet

📋 Undecimalis Pleco Overview Table

Feature Details
🌍 Origin Amazon & Orinoco River Basins – South America
📏 Max Size 18–20 inches
😇 Temperament Peaceful, community-safe
🏠 Tank Size 125+ gallons
⚗️ pH Range 6.5–7.8
🌡️ Temperature 74–82°F
🍽️ Diet Herbivorous/omnivorous – algae, vegetables, occasional protein
🎯 Ideal For Large aquariums or indoor ponds

✨ Highlight:
The Undecimalis Pleco is a large, peaceful algae-eating pleco with bold reticulated markings and an impressive dorsal fin — ideal for spacious aquariums or ponds needing both beauty and algae control.

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