Description
White Halfbeak (Dermogenys spp.)
The White Halfbeak is a unique and fascinating surface-dwelling fish, easily recognized by its elongated lower jaw and streamlined body. Its silvery-white coloration with subtle iridescent hues makes it a striking addition to freshwater and brackish aquariums. Unlike most community fish, White Halfbeaks spend much of their time near the water’s surface, where they display lively social interactions and quick darting movements.
These fish are livebearers and relatively hardy once settled, though they prefer calm environments with minimal surface disturbance. Best kept in small groups, White Halfbeaks thrive in planted aquariums with open swimming space and floating cover.
Quick Facts:
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Scientific Name: Dermogenys pusilla (and related Dermogenys species)
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Common Name: White Halfbeak
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Origin: Southeast Asia (Malaysia, Thailand, Indonesia)
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Max Size: ~3–3.5 inches
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Temperament: Peaceful but may spar with males
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Diet: Omnivorous – flakes, floating pellets, small live/frozen foods (brine shrimp, daphnia, mosquito larvae)
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Tank Size: 20+ gallons (long tanks preferred)
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Water Parameters:
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Temperature: 24–28°C (75–82°F)
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pH: 7.0–8.0
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Hardness: Moderate to hard water (8–20 dGH)
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Can adapt to freshwater or mildly brackish conditions
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Experience Level: Beginner to intermediate
Why Choose the White Halfbeak?
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Distinctive surface-dweller with a unique jaw shape
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Hardy and adaptable to both freshwater and low-end brackish aquariums
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Peaceful community fish when kept with non-aggressive tank mates
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Lively schooling behavior adds activity to the upper water column
