Borneo Redline Halfbeak Care Guide
Hemirhamphodon tengah · Freshwater Fish
What Borneo Redline Halfbeak look like
The Borneo Redline Halfbeak (Hemirhamphodon tengah) exhibits a slender, elongated body that typically reaches a maximum adult size of 3 to 4 inches (7.5 to 10 cm). Characterized by a distinctive elongated lower jaw, this species displays a silvery body adorned with a prominent red or orange lateral line that extends from the head to the base of the caudal fin. Males are identifiable by their modified anal fins, which are elongated and serve a role in courtship displays. The fish possesses a streamlined, fusiform shape that aids in its surface-dwelling lifestyle, while its dorsal and anal fins are positioned far back on the body, enhancing its agility in the water column. The presence of a lateral line system allows for the detection of vibrations in the water, an adaptation beneficial for both foraging and predator avoidance.
Behavior & temperament
Hemirhamphodon tengah is primarily a surface-dwelling species that exhibits social behavior typical of a schooling fish, often found in small groups near the water's surface in its natural habitat. It is generally peaceful but can display territoriality during breeding periods. The breeding behavior of this species involves egg scattering, where females release eggs into the water column, allowing fertilization to occur externally. The Borneo Redline Halfbeak is known for its active swimming patterns and can exhibit mild aggression when competing for food or during mating rituals, particularly among males vying for female attention.
Diet & feeding
In the wild, the Borneo Redline Halfbeak is a carnivore, feeding primarily on small invertebrates and zooplankton. In captivity, it requires a diet rich in high-quality flake foods, live or frozen foods such as brine shrimp and daphnia to meet its nutritional needs.
Behind the name
Hemirhamphodon (half jaw; from Greek 'hemi' meaning half and 'rhamphos' meaning beak) and 'tengah' (middle; from Malay, referring to its habitat).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
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