Yellow Fin Spiney Eel

Also known as the Barred or Yellow-fin Spiny Eel, Macrognathus pancalus is a small, peaceful freshwater fish native to South Asia. Reaching a maximum length of about 18–20 cm (7–8 inches), it features an elongated body, a distinctive tubular snout, and a habit of burrowing into the substrate.

Key Species Facts

• Natural Habitat: Slow-moving, shallow rivers, estuaries, and flooded fields in India, Bangladesh, and Nepal.

• Sexual Dimorphism: Females are generally larger and more robust, while males are noticeably more slender.

• Diet: In the wild, they are micro-predators that forage on crustaceans, aquatic insects, and annelids.

• Behavior: They are primarily nocturnal and secretive, often burying themselves in soft sand with only their eyes peeking out.

Aquarium Care

If keeping this fish in a home setup, they require specific conditions to thrive:

• Tank Size: At least a 75-90 liter (20-30 gallon) aquarium.

• Substrate: Fine, soft sand is absolutely necessary to accommodate their natural burrowing behavior without damaging their delicate snouts.

• Water Parameters: Temperature 22°C - 28°C (72°F - 82°F); pH 7.0–8.5.

• Tank Mates: Keep them with peaceful species of similar size. Avoid overly aggressive or fast-eating fish, as M. pancalus can be slow to secure food.

• Feeding: They require live or frozen foods such as bloodworms, brine shrimp, and daphnia. They can sometimes be weaned onto high-quality sinking pellets, but thrive best on meaty foods.

• Tank Setup: Provide plenty of hiding spots using driftwood, rock crevices, and smooth vegetation. Ensure the tank has a tightly fitting lid, as they are notorious for escaping.