| Arrow dragonet | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Division: | Teleostei |
| Order: | Syngnathiformes |
| Family: | Callionymidae |
| Genus: | Callionymus |
| Species: | C. sagitta |
| Binomial name | |
| Callionymus sagitta Pallas, 1770 | |
| Synonyms | |
|
Repomucenus sagitta (Pallas, 1770) | |
The arrow dragonet (Callionymus sagitta), also known as the arrow-headed darter dragonet, is a species of dragonet widespread in the Indo-West Pacific from Arabian Peninsula to the Philippines. Occurs in the Mekong delta of Viet Nam and probably also in Cambodia. This species grows to a length of 11 centimetres (4.3 in) TL. The arrow dragonet is a demersal species, which occurs on sandy substrates along coastlines, in estuaries, and in the lower courses of rivers where it feeds on worms, zooplankton and phytoplankton.