Red Lined Halfbeak Care Guide
Hemirhamphodon phaiosoma · Freshwater Fish

What Red Lined Halfbeak look like
The Red Lined Halfbeak (Hemirhamphodon phaiosoma) exhibits a slender, elongated body that is laterally compressed, reaching a maximum adult size of approximately 3-4 inches (7.5-10 cm). This species is characterized by its distinctive red-brown line markings that run longitudinally along the body, enhancing its visual appeal. The lower jaw is notably elongated, a hallmark of the halfbeak family, which aids in its surface feeding behavior. Sexual dimorphism is subtle, with males typically displaying more vibrant coloration and slightly larger fins compared to females. Defensive adaptations include a streamlined body shape that allows for quick bursts of speed to evade predators. The species possesses a well-defined lateral line system, which aids in detecting water movements, and features a small adipose fin, contributing to its hydrodynamic profile.
Behavior & temperament
The Red Lined Halfbeak is primarily a surface-dwelling species, often found in schools near the water's surface, indicating a social and gregarious nature. It exhibits a hierarchical social structure, with dominant individuals often displaying more vibrant coloration. Breeding behavior is characterized by egg scattering, where females release eggs into the water column, allowing for external fertilization. This species is generally peaceful but can exhibit territorial behaviors during breeding seasons. Its temperament is mild, making it suitable for community tanks, provided that tank mates are similarly non-aggressive.
Diet & feeding
In the wild, the Red Lined Halfbeak primarily feeds on small invertebrates and zooplankton, making it a carnivorous species. In captivity, it thrives on a diet consisting of high-quality flake foods, live or frozen foods such as brine shrimp and daphnia, ensuring adequate protein intake for optimal health.
Behind the name
Hemirhamphodon (half-rhamphus); phaiosoma (gray body).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Red Lined Halfbeak?
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