Description
The Half Beak is a small, sleek freshwater fish native to Southeast Asia, prized for its elongated lower jaw and surface-dwelling behavior. Known for its active swimming near the water surface and peaceful temperament, it thrives in well-planted aquariums with calm water and stable conditions. Its schooling nature makes it an engaging species for community tanks, particularly in mid- to upper-water zones.
Features of Half Beak
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Slender, streamlined body with elongated lower jaw resembling a “half beak”
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Silver to greenish body coloration with subtle reflective sheen
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Adult size typically ranges from 7–10 cm
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Peaceful and social, best kept in groups of 5 or more
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Active surface dweller, constantly swimming in mid- to upper-water
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Lifespan of 3–5 years under optimal conditions
The best aquarium size for Half Beak
A minimum aquarium volume of 80 litres is recommended for a small school, providing sufficient surface swimming space. Larger aquariums of 120 litres or more are ideal for multiple schools or mixed-species setups. Tank length of at least 80 cm ensures open horizontal swimming areas.
Tank Mate Compatibility for Half Beak
Compatible tank mates are peaceful, small species that occupy mid- to lower-water zones:
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Guppy
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Zebra Danio
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Harlequin Rasbora
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Corydoras Catfish
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Dwarf Gourami
Diet for Half Beak
Half Beaks are primarily surface feeders and omnivorous. In captivity, they accept high-quality flake or micro-pellet foods designed for surface feeders, supplemented with live or frozen foods such as daphnia, brine shrimp, and mosquito larvae. Occasional finely chopped vegetables or algae flakes support balanced nutrition.
Aquarium Setup Half Beak
Aquarium Filtration
Gentle filtration is important to maintain clean water without creating strong surface currents. Sponge filters or low-flow hang-on-back filters are suitable.
Aquarium Plants
Floating plants such as Duckweed or Hornwort provide cover, simulate natural habitats, and reduce stress. Submerged plants like Java Fern enhance foraging opportunities.
Aquarium Lighting
Moderate lighting is recommended, sufficient to support plant growth while preventing excessive glare on the water surface.
Aquarium Heating
Maintain stable temperatures between 23–27 °C using a reliable heater and thermostat, reflecting their tropical origin.
Aquarium Substrate
Fine sand or smooth gravel is ideal, allowing safe foraging for any bottom-dwelling tank mates and enhancing natural aesthetics.
Aquarium Decorations
Incorporate driftwood, rocks, and plant clusters to create shaded areas near the surface, while leaving ample open swimming space for schooling behavior.
