Mastacembelus erythrotaenia – Fire Eel

Mastacembelus erythrotaenia, commonly known as the Fire Eel, is a striking freshwater species prized for its elongated body and vivid red to orange stripe patterns. Native to Southeast Asia, this spiny eel adds both elegance and uniqueness to large aquarium setups. Despite its name, the Fire Eel is generally peaceful and can coexist with similarly sized or larger tankmates.

Key Features:

• Scientific Name: Mastacembelus erythrotaenia

• Common Name: Fire Eel

• Origin: Southeast Asia

• Size: Can grow up to 60–100 cm in captivity under proper care

• Temperament: Generally peaceful but may prey on very small fish and invertebrates

Care and Requirements:

• Tank Size: Minimum of 400–500 liters is recommended due to its potential adult size.

• Water Parameters: Temperature 24–28°C; pH 6.5–7.5; soft to moderately hard water.

• Substrate: Fine sand or smooth gravel to prevent injury to the eel’s sensitive skin.

• Décor: Provide ample hiding spaces using driftwood, caves, or PVC pipes, as the Fire Eel is nocturnal and appreciates shelter.

• Diet: Carnivorous – thrives on a varied diet of live or frozen foods such as bloodworms, earthworms, shrimp, and small fish. Can be trained to accept pellets over time.

• Behavior: Best kept with medium to large, non-aggressive fish. Avoid small tankmates that may be seen as food.

Care Tips:

• Ensure a secure aquarium lid, as Fire Eels are excellent escape artists.

• Regular water changes and strong filtration are essential to maintain water quality.

• Provide a dimly lit or shaded environment to reduce stress and encourage natural behavior.

The Fire Eel is a remarkable showpiece for experienced aquarists, offering both beauty and fascinating behavior. With proper care, it can live for many years, becoming a centerpiece in large freshwater aquarium