The Hillstream loach is a unique, small freshwater fish known for its flattened, streamlined body and wide, "wing-like" pectoral and pelvic fins, which allow it to cling to rocks like a miniature stingray in fast-moving, oxygen-rich streams. They exhibit distinct patterns, often a network of black lines on a yellowish-brown background or a mottled pattern, and typically grow to about 5 to 7.5 cm. Hillstream loaches prefer a cooler water environment compared to most tropical fish, with an ideal temperature range of 18°C to 24°C