AquaStocker

Hatchetfish Care Guide

Carnegiella strigata · Moderate care · 15 gallon minimum

Updated June 2026
By the AquaStocker team · How we source our data
Hatchetfish (Carnegiella strigata)
Photo via Wikimedia Commons 📌 Save

A surface-dwelling, deep-chested fish that 'flies' to catch insects; a notorious jumper — keep tightly lidded.

Adult size1.5"
Min tank15 gal
Temp75–82°F
pH5.5–7
TemperamentPeaceful
SocialGroups of 6+
Care levelModerate
DietCarnivore

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How big does a hatchetfish get?

A hatchetfish (Carnegiella strigata) reaches about 1.5 inches as an adult. Plan tank size and tank mates around the adult size, not the small fish you buy at the store.

Tank size & setup

Give a hatchetfish a minimum of 15 gallons, with water at 75–82°F and a pH of 5.5–7. Keep them in groups of at least 6 — they are shoaling fish and become stressed and washed-out alone. As a moderate-care, carnivore species, a stable, cycled tank with the right diet keeps them healthiest.

Good tank mates

Pair a hatchetfish with peaceful species that share its temperature and pH range. Compatible options include:

About the hatchetfish

The marbled hatchetfish is a species of freshwater ray-finned fish belonging to the family Gasteropelecidae, the freshwater hatchetfishes. The small deep-bodied fish, in the genera Carnegiella, is from the family Gasteropelecidae which includes both Gasteropelecus and Thoracocharax. This species is found in South America, and in rivers and streams all throughout Northern South America.

Recommended gear for hatchetfishs

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FAQ

What size tank does a hatchetfish need?
At least 15 gallons. Because they shoal, budget for a group of 6+ rather than a single fish. Bigger is always more forgiving for water quality.
Is the hatchetfish good for beginners?
It's a moderate-care species, so dial in a stable, cycled tank and correct water parameters first.

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