Yellow Fin Hillstream Loach

Gastromyzon Viriosus is also known as “Yellow Finned Hillstream Loach” or “Striped Borneo Sucker” is a member of the Gastromyzontidae family. Tatau River in Malaysia’s Sarawak region is the natural habitat of this fish.

Gastromyzon Viriosus is an endemic species which belongs to Malaysia. The name consists of the combination of the Greek words “gaster (stomach) ” and “myzo (to suckle)” and the Latin word “viriosus (strong).”
Gastromyzon Viriosus lives in the hills of Borneo, approximately 1350 meters above sea level, in shallow oxygen-rich waters. When suitable conditions are provided, they can live up to 3-4 years

Gastromyzon Viriosus can grow up to approximately 5.5 cm in length. The dominant color on the skin of the fish is dark brown. Besides, it has 8-10 cream-colored lines. The tail and upper fin are yellow and include black rounded and striped patterns. In stressful environments, skin colors may fade, and spots may become invisible. The most distinctive feature of the fish is its body structure that narrows from the head to the tail. Adult females are slightly larger than adult males.

Gastromyzon Viriosus is quite peaceful and can live in harmony with suitable tank mates. However, it is known that they have problems with species that are larger, aggressive, or have regional ownership. When environments similar to their natural life are created and kept in groups, they will display an even more calm attitude. Therefore, it is recommended to create groups of 4 or more fish in the same tank. On the other hand, in some cases, it has been reported that some individuals display regional protection behaviors, especially at feeding points. But, these behaviors are not causing any serious fights and injuries to the fish.