Gastromyzon Sp. 'Sk02'

Datasheet

General Description

The Gastromyzon Sp. 'SK02' is an undescribed species that has not yet entered the aquarium trade but has been occasionally maintained by private collectors. Belonging to the Gastromyzontidae family, these loaches have specialized morphology adapted to life in fast-flowing water, with features such as horizontally oriented paired fins, a flattened body, and fused pelvic fins forming a powerful sucking cup for clinging to solid surfaces. This species, with an etymology derived from Greek words meaning 'stomach' and 'to suckle,' is endemic to Borneo and known for its unique habitat preferences and behavior.

Aquarium Setup

For setting up an aquarium to accommodate Gastromyzon Sp. 'SK02,' it is crucial to ensure clean, well-oxygenated water using an oversized filter with a turnover rate of 10-15 times per hour. A substrate of gravel or sand mixed with water-worn rocks and pebbles should be provided, along with aged driftwood to mimic natural habitat. Additionally, strong lighting to promote algae growth, exposed filter sponges for grazing, and adaptable aquatic plants for cover are recommended. Stable water conditions with slightly acidic to neutral pH levels, moderate hardness, and a temperature range of 20-24°C are essential aspects to consider.

Behaviour

Despite being very peaceful, Gastromyzon Sp. 'SK02' requires careful consideration when selecting tankmates due to its territorial nature and specific environmental needs. This species tends to exhibit territorial behavior, with some individuals showing a higher level of protectiveness over their space. While they can coexist with small, pelagic cyprinids, gobies, and rheophilic catfishes, it is advised to avoid housing them with larger, aggressive, or competitive fish. Observing these loaches in loose aggregations reveals their most interesting behavior, emphasizing the importance of acquiring them in suitable group sizes.

Feeding and Diet

In their natural habitat, Gastromyzon Sp. 'SK02' likely feeds on benthic algae and micro-organisms on solid surfaces. In captivity, they accept various food types, including dried foods, live or frozen bloodworms, and homemade gelatin-bound mixtures containing fresh vegetables and Spirulina. To ensure long-term health, providing a mature aquarium with ample algae-covered surfaces is recommended. Maintaining a separate tank to cultivate algae can be necessary if the main tank lacks sufficient algae growth. Additionally, emaciated specimens may require a consistent source of suitable foods for recovery.

Reproduction & Dimorphism

Breeding of Gastromyzon Sp. 'SK02' in aquaria remains a rare occurrence, with limited documented observations. Successful breeding attempts involved providing optimal tank conditions, rich diets, and specific temperature adjustments. Sexual dimorphism is evident in adult females, who are typically larger and heavier-bodied than males. Breeding experiments with wild-caught specimens resulted in the hatching of non-adhesive eggs and the development of fry, showcasing the potential for captive propagation.

Habitat and Distribution

Endemic to Borneo, Gastromyzon Sp. 'SK02' is specifically known from the headwaters of the Sungai Amandit river, a tributary of the Barito basin in the Meratus mountain range of Kalimantan Selatan province in Indonesian Borneo. These loaches inhabit swift, shallow streams with clear, oxygen-rich water, commonly found in riffles and runs above or below cascades. Their habitat typically consists of gravel, rocks, boulders, and algae-covered surfaces, with a preference for partially shaded areas near riparian vegetation.