Tiretrack Eel

Tiretrack Eel Overview

• Scientific Name: Mastacembelus favus

• Common Names: Tiretrack Eel, Leopard Spiny Eel

• Size: Up to 20 inches (50 cm) in captivity; can grow larger in the wild

• Lifespan: 8–10 years or more with proper care

• Coloration: Light tan to cream body with bold, irregular black or dark brown "tire track"-like patterns running along its length

• Body Shape: Long, slender, snake-like with a pointed snout and small dorsal spines running along the back

• Temperament: Generally peaceful but shy and nocturnal

• Activity Level: Mostly nocturnal; spends daytime hiding

Tank Setup

• Minimum Tank Size: 55 gallons or larger for adult

• Aquascape:

  • Soft sandy or fine gravel substrate (to prevent injury)

  • Plenty of caves, PVC pipes, driftwood, and rock crevices for hiding

  • Dense planting is optional but beneficial

  • Secure lid required (known jumpers)

• Lighting: Dim lighting or subdued; they prefer low-light environments

• Filtration: Strong, efficient filtration to maintain water quality

Stable water quality is critical for this sensitive species.

Diet

• Type: Carnivore

• Feeding Frequency: Once daily, preferably in the evening

• Diet Options:

  • Live or frozen foods (bloodworms, blackworms, brine shrimp, small earthworms)

  • High-quality sinking carnivore pellets

  • Occasionally small crustaceans or insect larvae

• Feeding Tip: May be reluctant to eat at first; feeding live foods can help acclimate them.

Behavior & Tank Mates

• Temperament: Generally peaceful but can be territorial toward similar species

• Best Tank Mates:

  • Larger peaceful fish (cichlids, gouramis)

  • Bottom dwellers like Corydoras catfish

• Avoid: Small fish (may be eaten), aggressive species, or overly boisterous tankmates

• Activity: Nocturnal and shy; provide hiding spots to reduce stress.

Special Care Tips

• Escape Artists: Provide a tight-fitting lid — they can squeeze through small gaps and jump out

• Handling: Avoid frequent handling; they have delicate skin and are prone to injury

• Substrate: Use soft substrate to prevent abrasion of the eel’s sensitive underside

• Water Quality: Keep water clean with frequent changes; they are sensitive to poor conditions

• Acclimation: Slow, careful acclimation is important to reduce stress

Fun Fact

Despite their eel-like appearance, tiretrack eels are actually part of the spiny eel family, characterized by the small spines along their dorsal fin which help protect them from predators. Their unique "tiretrack" pattern makes them instantly recognizable and a striking centerpiece in a species or community tank.