A uniquely shaped, peaceful surface-dwelling characin famous for its deep, keeled belly and incredible jumping ability. In the wild, they can leap from the water and 'fly' short distances using their powerful pectoral fins to catch insects or escape predators. A tight-fitting lid with absolutely no gaps is mandatory. They require floating plants to feel secure and must be kept in schools.
At a Glance
Tank Requirements
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Water Parameters
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Temperament & Compatibility
Available Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard
The standard Marbled Hatchetfish form. Due to their strict surface-dwelling nature and upward-facing mouths, they are easily outcompeted for sinking food and require floating flakes or freeze-dried insects (like bloodworms or daphnia). Best kept in a species-only top layer to avoid stress.
Same care requirements as the base species
Also known as: Wild Type, Common Hatchetfish
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🟢Ideal Tank MatesMarbled Hatchetfish Care Guide Summary
The Marbled Hatchetfish, scientifically known as Carnegiella strigata, belongs to the Characins family group. Adults reach a maximum size of approximately 4 cm and have a compressed body shape with a moderate growth rate. Classified as peaceful, this species primarily occupies the surface zone of the aquarium and produces a low level of biological waste.
To thrive, the Marbled Hatchetfish requires a freshwater only aquarium with a minimum volume of 60 litres and a tank length of at least 60 cm. Water temperature should be maintained between 24°C and 28°C, with a pH range of 5.5–7.5 and a general hardness of 1–12 dGH. A low water flow is preferred. An aquarium test kit can help you monitor these values.
The Marbled Hatchetfish is a rewarding species to keep, provided its core environmental needs are met. The Marbled Hatchetfish is typically available in one standard form.
Marbled Hatchetfish Habitat Setup
When setting up an aquarium for the Marbled Hatchetfish, a low water flow best suits their natural preferences. Because this species occupies the surface zone, the aquarium layout should prioritise adequate surface area with floating cover to make them feel secure near the waterline. Useful additions include leaf litter or blackwater tannins to replicate their natural soft-water habitat and floating plants to diffuse overhead light and create shaded areas. Keepers should note that a tight-fitting lid is essential, as this species is a known jumper.
Marbled Hatchetfish Compatibility Notes
Classified as peaceful, the Marbled Hatchetfish is a schooling species that feels most secure in a sizeable group, where natural shoaling behaviour reduces stress and brings out their best colours. When choosing tankmates, boisterous or fast-moving tankmates may cause this species undue stress. Selecting tankmates that favour different water layers from the surface zone can help reduce competition and territorial overlap.
Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Marbled Hatchetfish.
20 Gallon High
20 Gallon Long
29 Gallon Standard
30 Gallon Breeder
36 Gallon Bowfront
40 Gallon Breeder
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Frequently Asked Questions About Marbled Hatchetfish
How big does Marbled Hatchetfish get?
Marbled Hatchetfish (Carnegiella strigata) typically reaches a maximum adult size of approximately 4 cm. They have a compressed body shape and a moderate growth rate.
What tank size does Marbled Hatchetfish need?
A minimum aquarium volume of 60 litres and a tank length of at least 60 cm are recommended for Marbled Hatchetfish. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Marbled Hatchetfish need?
Marbled Hatchetfish thrives in freshwater only conditions with a temperature range of 24–28°C, a pH between 5.5 and 7.5, and a general hardness of 1–12 dGH. A low water flow is preferred.
Is Marbled Hatchetfish peaceful or aggressive?
Marbled Hatchetfish is classified as peaceful with an aggression score of 1 out of 10. They are generally well-suited to peaceful community tanks.
How many Marbled Hatchetfish should be kept together?
Marbled Hatchetfish is a schooling species and should be kept in groups of at least 6. Larger groups help distribute aggression and encourage natural schooling behaviour.
Does Marbled Hatchetfish have any special tank requirements?
Yes. Marbled Hatchetfish benefits from plants - floating and leaf litter/blackwater in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Does Marbled Hatchetfish need a lid on the tank?
Yes. Marbled Hatchetfish 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.
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