Silver Hatchetfish (Gasteropelecus Sternicla)

Silver Hatchetfish — The Classic Surface Dweller for the Planted Aquarium

The Silver Hatchetfish (Gasteropelecus sternicla) is one of the most iconic surface-dwelling fish in the freshwater hobby. Instantly recognizable by its deep, laterally compressed body and brilliant silver sheen, this peaceful schooling fish from the rivers of South America adds a unique and elegant dimension to the upper water column of any planted aquarium.

Life at the Surface

Unlike most aquarium fish that occupy the mid or lower zones, the Silver Hatchetfish lives exclusively at the surface — gliding just beneath the waterline in tight, shimmering schools. Their reflective silver bodies catch the light beautifully, creating a dynamic, living mirror effect that brings constant movement and visual interest to an area of the tank that is often left empty.

Care Profile

• Scientific Name: Gasteropelecus sternicla
• Origin: South America (Amazon Basin, Orinoco, Guyana)
• Size: Up to 6 cm
• Temperament: Peaceful; best kept in schools of 6 or more
• Diet: Omnivore — accepts small floating foods, micro pellets, frozen daphnia, and fruit flies
• Water Temperature: 23–28°C
• pH: 6.0–7.0 (prefers soft, slightly acidic water)
• Tank Size: Minimum 80 cm / 80L
• Important: Capable jumpers — a tight-fitting lid is essential

Aquascape Compatibility

Silver Hatchetfish are completely plant-safe and peaceful with all community fish. They thrive in planted aquariums with floating plants or overhanging vegetation that replicates their natural Amazonian surface habitat. Avoid strong surface turbulence — they prefer calm, well-oxygenated water. An excellent choice for Nature Aquarium layouts, South American biotopes, and any tank where the surface zone deserves attention.

Silver, graceful, and unmistakably unique — the Silver Hatchetfish is the surface schooler your aquascape has been missing.