The lesser spiny eel or called Peacock eel, Macrognathus aculeatus, is a Southeast Asian tropical freshwater fish belonging to the Mastacembelidae family. They are uncommonly found in aquaria. It is identified by having a series of obliquely oriented bars down its body, the dorsal and anal fins have a row of isolated spines followed by a long continuous soft portion, both fins extending to but not confluent with caudal fin. The pelvic fins are absent. The caudal fin is rounded. They have 14-20 dorsal spines. It is typically brown-grey in colours.

As these fish like to burrow, use a soft, sandy substrate in their tank. Incorporate pieces of wood and rock work in order to create more hiding places – but ensure that the rocks are well placed so that they are not undermined by this species’ burrowing habits. Plants may get uprooted during their forays. Peacock eel are usually bottom dwellers during night but can also come to the surface or mid level for food during the day if hungry.

This species of fish accept meaty foods like bloodworms and small shrimp. They can eat flake food as well but will eventually die from a strict diet of just flake food, the flake food should also be fed with bloodworms or small dried shrimp. When larger they can also eat common garden earth worms.

Adult Size: 35 cm
Purchasing size: 6 – 10 cm
Temperature: 73.4° – 82.4°F (23°- 28°C)
pH range: 6.5 – 7.5
Hardness: 15-Oct
Minimum tank size: 35 gallon
Diet type: Carnivore
Temperament: Ferocious