Can beginners keep hatchetfish?

Hatchetfish are generally considered suitable for intermediate keepers rather than complete beginners. Preventing jumping and setting up a proper schooling environment both take some know-how, so it helps to have some prior tropical fish experience first.

How many should I keep together?

Because they're strongly schooling fish, hatchetfish tend to settle down and display their natural swimming behavior better in a decent-sized group rather than alone or in pairs. Choose a group size appropriate for your tank.

Do hatchetfish jump out of tanks?

Yes, hatchetfish are known for leaping out of the water when startled, and jumping accidents are relatively common with this species. Covering the tank securely with a gap-free lid is the basic precaution.

What should I feed them?

Since they feed near the surface, floating pellets/flakes and frozen brine shrimp work well. Sinking foods are more likely to go uneaten, so it's best to avoid relying on them.

What is their lifespan?

Their typical lifespan is 3 to 5 years. While they stay compact at 3 to 6 cm as adults, maintaining stable water quality is key to helping them live a healthy, full life.

Hatchetfish

The hatchetfish is a tropical fish named for its distinctive body shape, resembling the blade of a hand axe. As a surface-dwelling species that spends most of its time just beneath the water's surface, a school of hatchetfish swimming together creates a beautiful, dynamic layer of movement in the upper part of the tank. They have a calm temperament and generally get along well with other small fish, but they're also known for leaping suddenly when startled, which makes them prone to jumping out of open tanks. With a lifespan of 3 to 5 years and an adult size of just 3 to 6 cm, they're compact but somewhat sensitive to water quality and environmental changes, making them better suited to keepers with some prior experience. They take a bit more care to keep well, but that effort is rewarded with a genuinely striking and rewarding fish to watch.

View Hatchetfish encyclopedia →

Find Hatchetfish breeders(0)

Limited Time Offer

0% commission on your first sales!Register by September 30, 2026 and your first 2 sales are commission-free!

Breeder Wanted!

List on BreederDirect and sell directly to customers nationwide!

Free registrationNo monthly feesCommission on sales only

Our 6 Transparency Commitments

All Tropical Fish listings include water quality, temperament, and tank size information from verified Breeder.

Origin Disclosed
Real Photos
Water Quality Disclosed
Recommended Tank Size
Temperament Disclosed
Breed Line Disclosed

All species Guppy Endler's Livebearer Betta Peaceful Betta Emerald Betta Brunei Beauty Discus Pleco Otocinclus Bristlenose Pleco Zebra Pleco Otocinclus Negro

Browse all 301 breeds

Filter

Price

Region

Has show resultsChampion titles

Attributes

WYSIWYG (Actual photo)

0 items

Sort by

No listings match your filters

Adjust your filters, or get notified when new listings arrive.

Find breeders Browse the Tropical Fish encyclopedia Clear filters

Getting alerts is free with a member account. When new listings match your saved search, we'll notify you by email and in-app.

Browse other categories

Dogs Cats Marine Fish Coral Goldfish Medaka Reptiles & Amphibians Small Pets Birds Insects Exotic Invertebrates

Verified breeders (preview)

中

中村篤史 Breeder

大阪府

西

西川康弘 Breeder

香川県

Are you raising tropical fish?

Apply as a breeder

Hatchetfish key facts

Care level: Intermediate
Lifespan: 3-5 years
Size: 3-6cm
Diet: Floating pellets, frozen brine shrimp
Container & Tank: It swims in groups just below the surface, so a gap-free lid is an absolute must. A wide tank with room to swim along the surface suits it.
Swimming: Swims just below surface. Adds surface activity
Water Temperature & Quality: Suited to 24-28°C and slightly acidic to neutral water (pH 6.0-7.5). It is sensitive to water changes, so avoid sudden shifts.
Diet & Feeding: Feed floating foods and flakes that stay at the surface. It also eagerly takes small insects such as cricket nymphs.
Health & Cautions: Fairly sensitive to transport stress and water changes, so take plenty of time acclimatising it when first introduced.
Notes: Extremely prone to jumping — seal lid completely

TraitsHatchet-shapedSurface fishJumping riskSchooling

About Hatchetfish

Hatchetfish are surface-dwelling tropical fish known for their distinctive axe-shaped body and stunning schooling behavior. Living 3-5 years and reaching 3-6 cm, this species requires a secure lid and is best suited to intermediate keepers.

7 things to know before welcoming a Hatchetfish

1A Secure Lid Is Essential
Hatchetfish are known for leaping suddenly out of the water when startled, so any gap in the tank cover can lead to a fish jumping out. Before bringing them home, make sure you have a lid that covers the entire tank, including any gaps around cords or filters.
2A Surface-Swimming Fish
Hatchetfish spend most of their time swimming just beneath the water's surface. Arranging your tank layout to leave open swimming space in the upper layer will let you fully enjoy the sight of them schooling together.
3Best Kept in Groups
As a strongly schooling species, hatchetfish tend to seem unsettled and don't show their natural swimming beauty when kept alone or in very small numbers. Keeping a decent-sized group together brings out their appeal as a school.
4Feed Floating Foods
Since hatchetfish feed near the water's surface, floating pellets or flakes and frozen brine shrimp suit them better than sinking foods. Offer amounts they can finish before the food sinks out of reach.
5Peaceful and Community-Friendly
Hatchetfish are generally peaceful and mix well with other calm, similarly sized small fish. Avoid housing them with aggressive tankmates, as being startled increases the risk of jumping.
6Sensitive to Water Changes
This species can be somewhat sensitive to sudden changes in water conditions. Take your time with drip acclimation when introducing them, and keep water parameters stable day to day to help them thrive.
7Suited to Intermediate Keepers
Hatchetfish are considered suitable for intermediate keepers. Being prepared to put in a bit of extra effort beforehand — securing the tank and setting up a proper schooling environment — will help you enjoy them for the long term.

Frequently asked questions about Hatchetfish

Q.Can beginners keep hatchetfish?: A.Hatchetfish are generally considered suitable for intermediate keepers rather than complete beginners. Preventing jumping and setting up a proper schooling environment both take some know-how, so it helps to have some prior tropical fish experience first.
Q.How many should I keep together?: A.Because they're strongly schooling fish, hatchetfish tend to settle down and display their natural swimming behavior better in a decent-sized group rather than alone or in pairs. Choose a group size appropriate for your tank.
Q.Do hatchetfish jump out of tanks?: A.Yes, hatchetfish are known for leaping out of the water when startled, and jumping accidents are relatively common with this species. Covering the tank securely with a gap-free lid is the basic precaution.
Q.What should I feed them?: A.Since they feed near the surface, floating pellets/flakes and frozen brine shrimp work well. Sinking foods are more likely to go uneaten, so it's best to avoid relying on them.
Q.What is their lifespan?: A.Their typical lifespan is 3 to 5 years. While they stay compact at 3 to 6 cm as adults, maintaining stable water quality is key to helping them live a healthy, full life.

Useful tools for Hatchetfish care

💧Aquarium Volume CalculatorCalculate water volume, weight, and heater wattage from tank dimensions 🧪Water Quality CheckerFind compatible fish, shrimp, plants & corals based on pH, temperature & hardness 🍽️Feeding GuideCheck feeding frequency, portion sizes & supplements by species and growth stage 🤝Compatibility CheckerCheck compatibility between two species on a 5-level scale 📊Fish Compatibility MatrixCheck fish compatibility at a glance with our matrix chart 🔄Nitrogen Cycle GuideAuto-calculate bacteria colonization timeline for new tank cycling 🗓️Seasonal Care CalendarMonthly care events and seasonal management tips at a glance 🚿Water Change CalculatorAuto-calculate optimal water change frequency and volume by tank size and fish count 🐠Stocking CalculatorCalculate max fish capacity for your tank size with overstocking alerts ⚡Electricity Cost SimulatorCalculate monthly and annual electricity costs for care equipment with presets 🧬Breeding PlannerSelect parent varieties to view breeding schedules and offspring patterns 🏞️Tank Layout PlannerGet substrate, plant & hardscape suggestions based on tank size and style 🧮Care Cost SimulatorEstimate initial, monthly & annual costs by category, care level and quantity ⚖️Species Comparison ToolCompare two species side by side: care difficulty, size, lifespan & temperature 🎯Pet Match DiagnosticAnswer 7 questions to find your top 3 perfect pets 📋Lifetime Cost SimulatorEstimate lifespan and lifetime costs by species for dogs, cats, reptiles and more 🚚Transport Safety CheckerCheck transport safety score and precautions by category, season, method and distance 💊Medication Dosage CalculatorCalculate proper medication dosage by body weight and medicine type for fish, reptiles, and small animals ⏱️Quarantine & Acclimation TimerManage quarantine periods and acclimation steps with countdown timers. Includes recommended durations by species

Learn more about Hatchetfish in the encyclopedia

View Hatchetfish encyclopedia entry →

Care difficulty, lifespan, size and diet — all basics covered.

Hatchetfish related articles

Hatchetfish Care Guide | Essential Lid for Flying Fish, Slightly Acidic Water, and the Beauty of Schooling

A complete care guide for the hatchetfish, a surface-dwelling tropical fish native to South America. This guide covers the importance of a lid to prevent jumping, slightly acidic and soft water conditions, choosing floating foods, selecting compatible tank mates, and even breeding challenges. Your complete guide to these unique flying fish.

See more Hatchetfish articles →