Ogilvie's Lizard Hillstream Loach

Ogilvie's Lizard Hillstream Loach (Homaloptera ogilviei) has a slender, elongated body with the typical Homaloptera wide pectoral fins and flattened profile. Named for the collector Ogilvie. Brown to olive mottled patterning provides excellent camouflage. Homaloptera hillstream loaches have a more elongated, lizard-like body profile than the rounder Gastromyzon and Beaufortia species — the wide pectoral fins, flattened underside, and lizard-like movement pattern give the genus its evocative common names.

Feeding & Care Tip: Live algae and biofilm growing on rocks and glass are the primary food source — see the algae requirement note above. Supplement with Hikari Mini Algae Wafers placed directly on rocks and blanched zucchini or spinach. Hikari Frozen or Freeze-Dried Baby Brine Shrimp can be offered very sparingly as an occasional protein supplement. Strong water flow and high oxygenation are as important as food for these fish.

⚠ Algae & Biofilm Requirement: Like Otocinclus catfish and Stiphodon gobies, hillstream loaches and Borneo suckers are specialized algae and biofilm grazers. They cannot survive without established live algae and biofilm growing on rocks, glass, and hardscape. A tank without significant algae growth will not support these fish regardless of supplemental feeding. Allow algae to establish thoroughly before adding hillstream loaches. Hikari Mini Algae Wafers placed directly on rocks and blanched vegetables supplement but do not replace live algae and biofilm growth.

Native to fast-flowing, clear, well-oxygenated mountain streams and rivers. The aquarium must replicate these conditions: strong filtration creating significant water movement, high oxygenation, rocky substrate and hardscape covered in established algae and biofilm, bright lighting to encourage algae growth, cool to moderate temperatures, and very clean water with low nitrates. These fish are sensitive to elevated nitrates and should never be added to immature aquariums.

Keep in small groups. Peaceful with other hillstream species and cool-water community fish. Strong flow, established algae, and rocky hardscape are essential.

The lizard-like locomotion of Homaloptera — crawling deliberately across rocks on wide pectoral fins — is fascinating to observe and unlike any other aquarium fish.

Care & Ideal Parameters