Tiger knifefish - (Gymnotus tigre)

🐟 Tiger Knifefish – (Gymnotus tigre) – Striking South American Knifefish for Sale

The Tiger Knifefish (Gymnotus tigre) is a rare and visually striking South American knifefish known for its bold tiger-like vertical stripes across a long, slender body. Native to slow-moving rivers, floodplains, and swampy habitats in South America, this species is nocturnal and highly predatory, using its elongated body and undulating fin movement to glide stealthily through the water. While related to the more common Banded Knifefish (Gymnotus carapo), the Tiger Knifefish is distinguished by its more vivid striping and unique appearance. Best kept by experienced aquarists, it thrives in large aquariums with ample hiding spots.

🔎 Quick Facts – Tiger Knifefish (Gymnotus tigre)

• 📛 Common Name: Tiger Knifefish
• 🔬 Scientific Name: Gymnotus tigre
• 🌍 Origin: South America – primarily in river basins of Argentina and surrounding regions
• 🎨 Appearance: Dark brown to black base color with bold yellow to tan vertical stripes, elongated knife-shaped body
• 📏 Max Size: 20–24 inches (50–60 cm)
• 💎 Availability: Rarely available; prized by knifefish collectors

😇 Behavior & Temperament

• ⚔️ Semi-aggressive and territorial toward similar species
• 🌙 Nocturnal; most active during low light or at night
• 🐟 Predatory toward smaller fish that can fit in its mouth

🏠 Aquarium & Tank Requirements

• 📦 Minimum Tank Size: 125+ gallons
• 🪵 Provide driftwood, PVC tubes, and caves for hiding
• 🌿 Dim lighting or floating plants to mimic natural environment
• 💡 Maintain secure lids; knifefish are skilled jumpers

💧 Water Parameters – Tiger Knifefish Care

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

🍽️ Diet – Carnivorous Predator

• 🐟 Live or frozen fish, shrimp, and worms
• 🦐 Frozen prawns, krill, and bloodworms
• 🚫 Avoid feeder fish to reduce the risk of disease

📋 Tiger Knifefish Overview Table

✨ Highlight:
The Tiger Knifefish is a rare and visually stunning knifefish with bold striping, nocturnal habits, and a sleek predatory presence, making it a prized species for advanced aquarists.