A fascinating, peaceful bottom-dweller with a pointed snout and distinct banding. Like all spiny eels, they are notorious escape artists and require a tightly fitting lid. A soft sand substrate is absolutely mandatory to prevent skin abrasions and subsequent bacterial infections when they burrow. They are nocturnal micropredators that will hunt small shrimp and fry, but remain peaceful toward larger tank mates.
Half Banded Spiny Eel At a Glance
Half Banded Spiny Eel Tank Requirements
Will Half Banded Spiny Eel fit in your tank?
Care guides tell you what Half Banded Spiny Eel needs, the next question is whether your tank can safely provide it. Test Half Banded Spiny Eel against your tank size, maintenance needs, and the fish you already keep before you buy.
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Half Banded Spiny Eel Water Parameters
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Half Banded Spiny Eel Temperament & Compatibility
Half Banded Spiny Eel Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Adult / Standard
Adult size. Will actively hunt dwarf shrimp and very small nano fish (like tiny rasboras or neon tetras) at night. Thrives when kept singly or in groups with other spiny eels.
Differs in 1 trait from base species
Also known as: Full Grown Adult
Juvenile (Grow-out)
Young spiny eels are often sold at 5-8cm. They can be grown out in a smaller aquarium but will eventually need a larger tank. They require small live/frozen foods like bloodworms to survive, as they often refuse dry pellets initially.
Differs in 4 traits from base species
Also known as: Baby Spiny Eel, Small
Half Banded Spiny Eel Care Guide Summary
The Half Banded Spiny Eel, scientifically known as Macrognathus circumcinctus, belongs to the Oddballs family group. Adults reach a maximum size of approximately 20 cm and have a eel body shape with a moderate growth rate. Classified as mostly peaceful, this species primarily occupies the bottom zone of the aquarium and produces a medium level of biological waste.
To thrive, the Half Banded Spiny Eel requires a freshwater only aquarium with a minimum volume of 110 litres and a tank length of at least 90 cm. Water temperature should be maintained between 24°C and 28°C, with a pH range of 6–7.5 and a general hardness of 5–15 dGH. A moderate water flow is preferred.
Due to its specialist needs, the Half Banded Spiny Eel is best suited for fishkeepers who can provide a carefully planned setup. This species is available in 2 varieties: Adult / Standard and Juvenile (Grow-out). Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Half Banded Spiny Eel Habitat Setup
When setting up an aquarium for the Half Banded Spiny Eel, a moderate water flow best suits their natural preferences. Because this species occupies the bottom zone, the aquarium layout should prioritise sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour, smooth gravel or rounded substrate to protect their sensitive barbels, and dense planting to provide cover, break sightlines, and reduce stress. Keepers should note that a tight-fitting lid is essential, as this species is a known jumper and expect substrate disturbance, so lightweight décor should be secured.
Half Banded Spiny Eel Compatibility Notes
Classified as mostly peaceful, the Half Banded Spiny Eel is adaptable and can be kept singly or in a small group, offering flexibility when planning a community tank. When choosing tankmates, ornamental shrimp are not safe companions and boisterous or fast-moving tankmates may cause this species undue stress. Selecting tankmates that favour different water layers from the bottom zone can help reduce competition and territorial overlap.
Half Banded Spiny Eel Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Half Banded Spiny Eel.
30 Gallon Breeder
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
Show 10 more tank sizes
Half Banded Spiny Eel Feeding & Diet Considerations
The Half Banded Spiny Eel will hunt and eat ornamental shrimp, making it unsuitable for shrimp-focused setups, will eat fry, so breeding efforts in the same tank are unlikely to succeed, and is primarily active at dusk and dawn, so offering food shortly after lights-off ensures it receives adequate nutrition.
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Frequently Asked Questions About Half Banded Spiny Eel
How big does Half Banded Spiny Eel get?
Half Banded Spiny Eel (Macrognathus circumcinctus) typically reaches a maximum adult size of approximately 20 cm. They have a eel body shape and a moderate growth rate.
What tank size does Half Banded Spiny Eel need?
A minimum aquarium volume of 110 litres and a tank length of at least 90 cm are recommended for Half Banded Spiny Eel. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Half Banded Spiny Eel need?
Half Banded Spiny Eel thrives in freshwater only conditions with a temperature range of 24–28°C, a pH between 6 and 7.5, and a general hardness of 5–15 dGH. A moderate water flow is preferred.
Is Half Banded Spiny Eel peaceful or aggressive?
Half Banded Spiny Eel is classified as mostly peaceful with an aggression score of 3 out of 10. They are generally well-suited to peaceful community tanks.
Can Half Banded Spiny Eel live alone?
Yes, Half Banded Spiny Eel can be kept singly or in a group. They are flexible and adapt well to both setups.
Is Half Banded Spiny Eel safe with shrimp?
No. Half Banded Spiny Eel is known to eat ornamental shrimp and is not recommended for shrimp tanks. Even larger shrimp species like Amano Shrimp may be at risk.
Does Half Banded Spiny Eel have any special tank requirements?
Yes. Half Banded Spiny Eel benefits from sand (sifters), smooth gravel (sensitive barbels), and plants - densely covered in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Does Half Banded Spiny Eel need a lid on the tank?
Yes. Half Banded Spiny Eel is a known jumper, and a tight-fitting lid or cover is essential to prevent escape. Even a small gap can be enough for a determined fish to leap out.
Top Tank Mates for Half Banded Spiny Eel
These fish are strong compatibility matches for Half Banded Spiny Eel based on water preferences, temperament, adult size, and tank behavior.
False Glass Catfish
Kryptopterus macrocephalus
Ideal Tank MatesBetta Imbellis
Betta imbellis
Ideal Tank MatesBanded Gourami
Trichogaster fasciata
Ideal Tank MatesMarbled Hatchetfish
Carnegiella strigata
Ideal Tank MatesGlass Catfish
Kryptopterus vitreolus
Ideal Tank MatesAmazon Leaf Fish
Monocirrhus polyacanthus
Ideal Tank MatesPlants That Suit Half Banded Spiny Eel
These plants pair well with Half Banded Spiny Eel based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Afzel's Anubias
Anubias afzelii
Anubias Barteri
Anubias barteri
Christmas Moss
Vesicularia montagnei
Congo Anubias
Anubias heterophylla
Coral Pelia
Riccardia chamedryfolia
Dwarf Buce
Bucephalandra pygmaea
Fish Similar to Half Banded Spiny Eel
Lesser Spiny Eel
Macrognathus aculeatus
A fascinating, elongated bottom-dweller known for its pointed snout. It is primarily nocturnal and spends much of its time buried in the substrate. While peaceful with fish too large to eat, it is an opportunistic predator that will consume small fish, shrimp, and fry. A soft sand substrate is absolutely mandatory to prevent severe bacterial skin infections from burrowing.
Tire Track Eel
Mastacembelus armatus
A massive, predatory spiny eel known for its distinctive tire-track patterning. They are nocturnal bottom-dwellers that love to burrow. A soft sand substrate is absolutely mandatory; sharp gravel will severely damage their skin and lead to fatal bacterial infections. While peaceful to fish too large to swallow, they are highly efficient predators that will eat any tank mate that fits into their surprisingly large mouths. Excellent escape artists; a heavy, tight-fitting lid is required.
Zebra Spiny Eel
Mastacembelus zebrinus
The Zebra Spiny Eel is a fascinating, small eel-like fish native to the Inle Lake region of Myanmar. Known for its striking vertical stripes and elongated snout, it is a peaceful but shy bottom-dweller. It strictly requires a soft sand substrate to burrow into, as gravel can severely damage its skin and lead to fatal bacterial infections. A micropredator by nature, it will hunt small shrimp and fry but remains entirely peaceful toward appropriately sized tank mates. A tight-fitting lid is absolutely mandatory, as they are notorious escape artists.
Peacock Eel
Macrognathus siamensis
A peaceful, nocturnal spiny eel native to Southeast Asia, easily identified by the false eyespots (ocelli) along its dorsal fin. They are notorious escape artists and avid burrowers. A soft sand substrate is absolutely mandatory to prevent severe bacterial skin infections from scratching, along with a tight-fitting lid. They are picky eaters that generally require live or frozen meaty foods like bloodworms.
Kuhli Loach
Pangio kuhlii
A remarkably peaceful, eel-like bottom dweller native to the slow-moving forest streams of Southeast Asia. Famous for its orange and dark brown banding, the Kuhli Loach is an excellent scavenger. They are notoriously shy and nocturnal, requiring dense planting, leaf litter, and most importantly, a soft sand substrate to burrow in without damaging their delicate barbels. They must be kept in groups to feel secure and prevent severe stress.
Banded Apistogramma
Apistogramma bitaeniata
A stunning South American dwarf cichlid native to the blackwater streams of the Amazon basin. Known for their distinct dual lateral stripes, they are a bottom-dwelling species that requires soft, acidic water, sandy substrate, and complex environments with caves or leaf litter. They are generally peaceful in a community tank but highly territorial towards other bottom-dwellers, especially when breeding.