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False Tiger Knifefish - (Gymnotus javari)

False Tiger Knifefish - (Gymnotus javari)

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False Tiger Knifefish - (Gymnotus javari)
Fish Details, Description and Information Below:

🐟 False Tiger Knifefish (Gymnotus javari)

The False Tiger Knifefish is an elongated, nocturnal predator with striking barred patterns reminiscent of a tiger. Found in slow-moving waters of South America, it’s a secretive yet fascinating species best suited for experienced fishkeepers.


🔍 Quick Facts

  • 🆔 Common Name: False Tiger Knifefish
  • 🧬 Scientific Name: Gymnotus javari
  • 🧬 Family: Gymnotidae
  • 🌎 Origin: Amazon Basin, primarily Peru and Brazil
  • 📏 Max Size: 30–40 cm (12–16 inches)

🕊️ Behavior & Temperament

  • 🌙 Primarily nocturnal, hiding during the day and hunting at night
  • 🐠 Can be territorial with other knifefish or similar-shaped species
  • 🍽️ Carnivorous—feeds on live and frozen foods
  • ⚠️ Best kept singly or with robust, non-aggressive tankmates

🏡 Tank Requirements

  • 🛁 Minimum Tank Size: 55 gallons (75+ recommended for adults)
  • 🪵 Provide caves, driftwood, and dense vegetation for hiding
  • 💨 Moderate water flow with high oxygenation
  • 🌑 Dim lighting to mimic natural environment

Water Parameters:

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

📊 Overview Table

🏷️ Feature 📋 Details
🆔 Common Name False Tiger Knifefish
🧬 Scientific Name Gymnotus javari
🌍 Origin Amazon Basin (Peru, Brazil)
📏 Max Size 12–16 inches (30–40 cm)
🕊️ Temperament Nocturnal, territorial
🛁 Tank Size 55–75+ gallons
⚗️ pH Range 6.0–7.5
🌡️ Temperature 75–82°F (24–28°C)
🍽️ Diet Carnivorous—live/frozen foods
🐠 Ideal For Experienced aquarists with large aquaria

📝 Snippet

The False Tiger Knifefish (Gymnotus javari) is a striking nocturnal predator from the Amazon Basin. Its bold tiger-like bands and secretive behavior make it a captivating species for advanced fishkeepers with large, well-decorated tanks.

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