Celebes Halfbeak Care Guide
Nomorhamphus liemi · Freshwater Fish

What Celebes Halfbeak look like
The Celebes Halfbeak (Nomorhamphus liemi) exhibits a fusiform body shape, characterized by an elongated lower jaw that is a distinctive feature of the halfbeak family. Adults can reach a maximum size of approximately 3 to 6 inches (7.5 to 15 cm), with males typically being more vibrant in coloration than females. Sexual dimorphism is evident, as males display a modified anal fin, which is often elongated and more colorful, showcasing hues of red, blue, or dark tones on the lower jaw and fins, while females tend to have a more subdued coloration. The body is more robust compared to other halfbeak species, and they possess a prominent lateral line that aids in detecting movement in the water. Defensive adaptations include their ability to swiftly dart away from predators, utilizing their streamlined shape and agility in the water column.
Behavior & temperament
The Celebes Halfbeak is primarily a pelagic fish, often found swimming in the upper layers of freshwater bodies in Sulawesi. They are social creatures that prefer to inhabit schools, which provides safety in numbers against potential predators. Their behavior is generally peaceful, though males may exhibit territoriality during breeding periods, particularly when competing for mates. Breeding involves egg scattering, with females releasing eggs into the water column where fertilization occurs externally. This species is known for its active swimming patterns and can often be seen darting around the tank or natural habitat, displaying a lively temperament.
Diet & feeding
In the wild, the Celebes Halfbeak is an omnivore, feeding on a varied diet that includes small invertebrates, algae, and plant matter. In captivity, they thrive on high-quality flake foods, live or frozen foods such as brine shrimp and daphnia, and should also be provided with plant matter to meet their dietary needs.
Behind the name
Nomorhamphus (from Greek 'nomos' meaning law and 'hamphus' meaning jaw); liemi (named in honor of an individual or locality).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Celebes Halfbeak?
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