BLUE ZEBRA BORNEO HILLSTREAM LOACH ( Gastromyzon sp. “Blue Zebra”)

Blue Zebra Borneo Hillstream Loach

Gastromyzon sp. “Blue Zebra”

The Blue Zebra Borneo Hillstream Loach is a truly eye-catching and unique freshwater fish, prized for its striking electric blue tones and bold zebra-like striping. Native to the fast-flowing, oxygen-rich streams of Borneo, this species is perfectly adapted to life in strong currents, using its specially evolved suction-cup fins to cling to rocks and glass.

Not only is this loach visually stunning, but it also plays a functional role in the aquarium—grazing on biofilm and algae, helping keep surfaces clean. Its peaceful nature makes it an excellent addition to well-planned community tanks with similar environmental needs.

Key Features

• Vibrant blue coloration with zebra striping
• Unique “sucker” body shape for clinging to surfaces
• Excellent natural algae and biofilm grazer
• Peaceful and ideal for specialty community tanks
• Rare and highly sought-after species

Care Guide

Tank Size

Minimum 20 gallons (larger preferred for groups and proper flow setup)

Temperature

20–24°C (68–75°F)

pH

6.5–7.5

Hardness

Soft to moderately hard water

Tank Setup

The Blue Zebra Hillstream Loach thrives in a river-style aquarium:

• Strong water flow (powerheads or wavemakers recommended)
• High oxygenation (air stones or surface agitation)
• Smooth rocks and driftwood for grazing and resting
• Sand or fine gravel substrate
• Established tank with plenty of biofilm growth

A “river manifold” setup is ideal to replicate their natural habitat.

Diet

Primarily herbivorous grazers:

• Algae and biofilm (essential for long-term health)
• High-quality sinking wafers
• Spirulina-based foods
• Blanched vegetables (zucchini, spinach)
• Occasional protein foods (frozen daphnia or brine shrimp)

Temperament

• Peaceful and non-aggressive
• Best kept in small groups (3–6+)
• May show mild territorial behavior with their own kind, but rarely harmful

Tank Mates

Ideal companions include:

• Small, peaceful fish that enjoy cooler, well-oxygenated water
• Danios, white cloud minnows, and other current-loving species

Avoid:

• Aggressive fish
• Slow-moving or long-finned species that dislike strong flow

Special Notes

• Requires pristine water conditions—regular maintenance is key
• Sensitive to poor oxygen levels and high temperatures
• Not recommended for newly set up aquariums

Why You’ll Love It

The Blue Zebra Borneo Hillstream Loach is perfect for aquarists looking to create a dynamic, river-style aquarium. Its rare beauty, fascinating behavior, and practical algae-grazing abilities make it a standout addition to any specialized freshwater setup.