''Doryichthys heterosoma'' is a species of freshwater fish of the family

Syngnathidae The Syngnathidae is a family of fish which includes seahorses, pipefishes, and seadragons (''Phycodurus'' and ''Phyllopteryx''). The name is derived from grc, σύν (), meaning "together", and (), meaning "jaw". The fused jaw is one of the tra ...

. It is only known from four specimens, which were collected from the

Sambas River Sambas River, or specifically referred to Big Sambas River (Indonesian: ''Sungai Sambas Besar''), is a river in Sambas Regency, West Kalimantan, Indonesia. The upstream is located in Kabupaten Bengkayang, flowing through the city of Sambas, c ...

West Kalimantan West Kalimantan ( id, Kalimantan Barat) is a province of Indonesia. It is one of five Indonesian provinces comprising Kalimantan, the Indonesian part of the island of Borneo. Its capital city is Pontianak, Indonesia, Pontianak. The province has ...

and the

Natuna Islands ''(Sacred Ocean, Fortune Land) , image_map = , pushpin_map = Indonesia Riau Islands#Indonesia Sumatra#Indonesia#South China Sea , pushpin_map_caption = Location in Riau Islands##Location in Sumatra##Location in I ...

in 1851. It is thought to be

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to these locations, feeding on small

crustaceans Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group ...

and insect larvae, where it can attain a maximum length of at least .Dawson, C.E., 1985. Indo-Pacific pipefishes (Red Sea to the Americas). The Gulf Coast Research Laboratory Ocean Springs, Mississippi, USA This species is

ovoviviparous Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction. Ovoviviparous animals possess embryos that develop insi ...

, with males carrying eggs and giving birth to live young.

References

Further reading