Source: Wikimedia Commons
Hatchetfish
IntermediateDistinctive hatchet-shaped body. Surface-dwelling fish that swims just below water line. Jumping risk — lid essential.
Difficulty
Intermediate
Temperature
22〜28℃
Lifespan
3-5 years
Size
3-6cm
Diet
Floating pellets, frozen brine shrimp
About
Hatchetfish (family Gasteropelecidae) are surface-dwelling characins native to the Amazon and Orinoco River basins of South America. Their name derives from their distinctive body shape — laterally compressed with a dramatically enlarged keel resembling the blade of a hatchet. Common aquarium species include the silver hatchetfish (Gasteropelecus sternicla), the marbled hatchetfish (Carnegiella strigata), and others. Reaching 3–6 cm, they possess a remarkable ability unique among freshwater fish: by rapidly vibrating their large pectoral fins, they can break the water surface and glide 1–3 meters through the air — used both for escaping predators and for catching insects hovering above the water. In aquariums, they occupy the surface zone, creating visual interest in an area typically left empty by other fish. Water conditions of pH 6.0–7.5 at 24–28°C are suitable. A secure, tight-fitting lid is absolutely mandatory due to their exceptional jumping ability. They accept floating pellets, fine flake, and small insects. Peaceful with most mid- and bottom-dwelling species, they require patient drip acclimation as they are somewhat sensitive to transport stress.
Basic Info
Origin
Amazon and Orinoco River basins, South America
Lifespan
3-5 years
Size
3-6cm
Temperature
22〜28℃
Diet
Floating pellets, frozen brine shrimp
Care Guide
Tank
Care Specifications
PeacefulGroup
Sources: Seriously Fish
References & Sources
Edited & verified by: br-choku editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Primary sources
Regulations & Conservation Status
Not CITES-listed
「ハチェットフィッシュ」は総称。代表種 Gasteropelecus sternicla で確認。科内に CITES 掲載種なし。
Sources: Seriously Fish / CITES Appendices (Checklist)
Regulations may change. Always verify the latest information with the relevant authorities.
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