Gastromyzon Viriosus

Datasheet

General Description

Known as Gastromyzon Viriosus, this species belongs to the family Gastromyzontidae under the classification order Cypriniformes. It is native to the Tatau River drainage in central Sarawak state, Malaysian Borneo. Typically reaching a maximum size of 5.5cm, these loaches are characterized by a dark brown body with vertical cream bars and a reticulated pattern on the head. They have specialized morphology adapted for life in swift, shallow streams.

Aquarium Setup

For setting up an aquarium suitable for Gastromyzon Viriosus, it is crucial to maintain clean, well-oxygenated water with a turnover rate of 10-15 times per hour. The tank should include gravel or sand substrate, water-worn rocks, and pebbles. Aged driftwood can be added, avoiding new pieces that may leach tannins. Algae-promoting strong lighting is recommended. Aquatic plants like Microsorum, Crinum, and Anubias can be included for cover and additional food sources. It is essential to have a stable setup with biofilm growth, and regular water changes are necessary.

Behaviour

Gastromyzon Viriosus are generally peaceful but somewhat territorial. They thrive in small groups and can be protective of their space, particularly around feeding areas. Suitable tankmates include small cyprinids, gobies, and rheophilic catfish. They are adapted to clinging to solid surfaces in fast-flowing water, displaying unique behaviors like crawling over rocks.

Feeding and Diet

In the wild, their diet consists mainly of benthic algae and micro-organisms. In captivity, they accept various foods like dried, meaty, and vegetable-based options. It is crucial to provide algae-covered surfaces for grazing. Maintaining a separate tank for growing algae may be necessary, especially in setups with herbivorous tankmates.

Reproduction & Dimorphism

Breeding Gastromyzon Viriosus in captivity is rare. Observations indicate successful breeding conditions with optimal water quality, diet, and specific tank setups. Females are typically heavier-bodied and slightly larger than males.

Habitat and Distribution

This species is endemic to Borneo, specifically found in the Tatau River drainage. Their habitat includes swift, shallow streams with clear, oxygenated water, abundant algae-covered substrates like rocks and gravel, and partial to full shade from riparian vegetation. They are known to position themselves facing into the flow for feeding and territorial behaviors.