Mud Spiny Eel

Macrognathus aral is one of the most ecologically widespread spiny eels, occurring across much of South Asia from Pakistan through India, Nepal, Bangladesh, and Myanmar. It inhabits a remarkable diversity of aquatic environments including muddy rivers, irrigation canals, ponds, and seasonal floodplains, which has endowed it with considerable tolerance for variable water conditions.

In the aquarium its hardiness is a genuine asset, particularly for keepers who cannot maintain consistently soft, acidic water. While it lacks the vivid markings of the peacock or fire eel, its subtle brown patterning is attractive in its own way and it is an engaging and active fish once acclimatised.

Feeding is effortless: virtually any meaty food is accepted from the outset. Bloodworm, tubifex, earthworms, and sinking pellets are all eagerly consumed. Its robustness and straightforward feeding make it an excellent beginner species for those new to spiny eels, provided the tank has a soft sandy substrate and a fully sealed lid.

Water: Soft to hard, pH 6.0–8.0, temperature 22–28°C, GH 3–20, KH 1–12. Tank: Minimum 130 L, fine sand, hiding spots, robust sealed lid. Feeding: Carnivore; bloodworm, tubifex, earthworms, prawns, and sinking pellets. Breeding: Rarely reported; suspected seasonal egg-scatterer in warm shallow waters. Compatibility: Peaceful with medium-large fish; predatory toward very small tankmates.