Tiger Hillstream Loach

Species Profile

• Scientific Name: Sewellia lineolata
• Common Name: Tiger Hillstream Loach
• Adult Size: Approximately 3 inches (7.5 cm)
• Life Expectancy: 5–8 years with proper care
• Habitat: Native to fast-flowing, oxygen-rich streams and rivers in Vietnam. Found clinging to rocks and submerged wood in clear, cool water with strong currents

Tank Requirements

• Minimum Tank Size: 20 gallons (75 liters) or larger, with ample surface area and water flow
• Ideal Temperature: 68–75°F (20–24°C) — prefers cooler water
• pH Range: 6.5–7.5
• Water Hardness: Soft to moderately hard (2–12 dGH)
• Temperament: Peaceful and shy; best kept in groups or pairs. Non-aggressive and good community members with other peaceful species

Diet & Nutrition

• Omnivorous: Yes
• Diet: Primarily grazers of algae and biofilm. Accepts algae wafers, blanched vegetables (zucchini, spinach), and occasional protein foods such as bloodworms or brine shrimp

Appearance

• Coloration: Light brown to tan body with distinctive dark vertical and horizontal stripes forming a tiger-like pattern
• Body Shape: Flattened ventral surface with wide pectoral fins adapted for suction and holding onto surfaces in strong currents
• Fins: Large and spread out, helping with stability on rocks

Distinctive Features

• Tiger-like striped pattern provides excellent camouflage on rocky substrates
• Specialized sucker mouth and fins enable it to cling tightly to rocks in fast-flowing water
• Prefers cooler, well-oxygenated water with strong current—requires strong filtration and aeration in captivity
• Relatively small size and peaceful temperament make it suitable for community tanks with similar flow-loving species