Neon Borneo Sucker - Gastromyzon lepidogaster Fish Profile & Care Guide
Introduction
The Neon Borneo Sucker (Gastromyzon lepidogaster) is a small, benthic fish native to fast-flowing streams in Borneo. Belonging to the Balitoridae family, this species is well-adapted to its high-current environment. Its streamlined body and specialised suction mouth allow it to cling to rocks and graze on biofilm and algae. Neon Borneo Suckers are prized among aquarists for their unique appearance, including their flat body and vibrant colouration, which can vary depending on their habitat. This Loach occasionally appears in the aquarium trade.
Neon Borneo suckers are renowned for their generally peaceful disposition but may occasionally exhibit territorial behaviour, particularly around preferred feeding areas. They display fascinating social interactions when kept in groups of four or more. These fish thrive alongside compatible tankmates such as small cyprinids, stream-dwelling Gobies, and Rheophilic Catfish, but they should be housed away from aggressive or significantly larger species to ensure their well-being.
Neon Borneo suckers require pristine water conditions with slightly acidic, highly oxygenated, and cool water parameters, accompanied by robust water flow and aeration. Their environment should include ample rocky hiding spots and smooth pebbles and boulders for grazing. Bright lighting is essential to promote the growth of algae, a primary food source for these fish. While aquatic plants are not a natural part of their habitat, they can contribute to maintaining water quality. Suitable plants for high-flow aquariums include Anubias and Microsorum, both of which thrive when attached to rockwork or driftwood.
Neon Borneo Suckers are remarkable for their unique ability to change colour as they mature, undergoing multiple dramatic transformations. Juveniles start life as small, inconspicuous black hillstream loaches. As they transition to sub-adulthood, their appearance shifts dramatically to a vibrant orange hue. Upon reaching sexual maturity, their colour changes once more to a striking, reflective green. Mature individuals display even more fascinating traits, as they can alternate between these three distinct colour phases or adopt intermediate shades. Those exhibiting a blend of orange and green are exceptionally breathtaking, with their bodies appearing to shimmer due to a "dusting" of iridophore structural pigments that create a sparkling, holographic effect. This dynamic colouration makes them a captivating addition to any aquarium.
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Photos
Sexual Dimorphism
Female Neon Borneo Suckers tend to have a fuller body and are often marginally larger than males. These physical differences are most evident when viewing the fish from either an overhead or underside perspective.
Quick Facts
| Scientific Name | Gastromyzon lepidogaster |
|---|---|
| Year Described | 1982 |
| Other Names | Green Borneo Hillstream Loach |
| Kingdom | Animalia |
| Classification | Actinopterygii |
| Order | Cypriniformes |
| Family | Gastromyzontidae |
| Genus | Gastromyzon |
| Origins | Indonesia |
| Approx Max Size | 10 cm |
| Temperament | Peaceful |
| Aquarium Level | Bottom |
| Difficulty | Beginner - Intermediate |
| Shoaling | NA |
| Best kept as | Groups 5+ |
| Diet & Feeding | Omnivore |
| Reproduction | Egg Depositor |
| Average Lifespan | Up to 8 Years |
Water Parameters
| Water Type | Freshwater |
|---|---|
| pH | 6.0 - 8.0 |
| GH | 2 - 12 |
| TDS | 36 - 215 |
| ℉ | 64 - 75 |
|---|---|
| ℃ | 18 - 24 |
Natural Habitat
Neon Borneo Suckers are endemic to northern Borneo, where they inhabit fast-flowing streams characterised by clear, oxygen-rich water. These loaches are typically found in riffles with gravel and rock substrates covered in biofilm, often residing above or below cascades in partially shaded areas. The species is widely distributed across multiple river systems in Brunei Darussalam, East Kalimantan, Sabah and Indonesia.
Breeding
Successfully breeding Neon Borneo Suckers in captivity presents significant challenges, with only a few documented instances of success.
Diet & Feeding
In their natural habitat, Neon Borneo Suckers primarily feed on benthic algae and microorganisms. This diet can be effectively replicated in captivity by providing algae-covered surfaces supplemented with high-quality dried foods, live or frozen bloodworms, and homemade diets incorporating vegetables and Spirulina. Maintaining adequate algae growth in the aquarium is essential for their health, and if the primary tank cannot sustain sufficient algae, a dedicated algae cultivation tank may be necessary.
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Published: 03 Dec 2024
Last Updated: 03 Dec 2024