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Green Oto - (Hisonotus aky)

Green Oto - (Hisonotus aky)

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Green Oto - (Hisonotus aky)
Fish Details, Description and Information Below:

🐟 Green Oto (Hisonotus aky)

The Green Oto is a small, peaceful armored catfish native to South America. Known for its delicate greenish coloration and excellent algae-eating habits, it is a popular choice for nano tanks and planted aquariums.


🔍 Quick Facts

  • 🆔 Common Name: Green Oto
  • 🧬 Scientific Name: Hisonotus aky
  • 🧬 Family: Loricariidae
  • 🌎 Origin: South America — Paraguay and Paraná River basins
  • 📏 Max Size: Up to 1.5 inches (4 cm)

🕊️ Behavior & Temperament

  • 🕊️ Peaceful and social
  • 🐟 Active algae grazer
  • 🤝 Best kept in groups of 4 or more
  • 🏞️ Prefers well-planted tanks with plenty of hiding places

🏡 Tank Requirements

  • 🛁 Minimum Tank Size: 10 gallons+
  • 🪵 Provide driftwood, plants, and smooth rocks
  • 💨 Moderate filtration and stable water parameters

Water Parameters:

  • 🌡️ Temperature: 72–79°F (22–26°C)
  • ⚗️ pH: 6.5–7.5
  • 💧 Soft to moderately hard water

🍽️ Diet

  • Omnivorous — algae, biofilm, and sinking pellets

📊 Overview Table

🏷️ Feature 📋 Details
🆔 Common Name Green Oto
🧬 Scientific Name Hisonotus aky
🌍 Origin South America — Paraguay & Paraná basins
📏 Max Size Up to 1.5 in (4 cm)
🕊️ Temperament Peaceful, social
🛁 Tank Size 10+ gallons
⚗️ pH Range 6.5–7.5
🌡️ Temperature 72–79°F (22–26°C)
🍽️ Diet Omnivorous
🐠 Ideal For Nano tanks, planted community aquariums

📝 Snippet

The Green Oto (Hisonotus aky) is a tiny, peaceful algae-eating catfish perfect for small, planted tanks. Its social nature means it thrives in groups and adds gentle activity to any nano aquarium.

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