Royal Clown Loach (Leptobotia pellegrini)

The Holy Grail of loaches, the royal clown loach, is a species of botiid fish found in flowing water in the upper and middle Yangtze basin in China. It is a smaller loach as compared to the imperial flower loach, reaching approximately 8 inches. Predominantly a riverine loach favoring clear, well-oxygenated, running water with substrates of rocks and gravel. Often present in bedrock and boulder-filled headwater streams but also found in larger, turbidriver channels.

Royal Clown Loach — Leptobotia pellegrini

Bold pattern with river personality

The Holy Grail of loaches, the Royal Clown Loach is a striking Chinese river loach known for its dramatic contrast and active bottom-dwelling behavior. A warm golden to bronze base is crossed with bold, irregular black banding that gives it a “royal” patterned look. As the fish matures, the coloration deepens and the pattern becomes more defined, especially under moderate lighting.

Native to fast-moving river systems in China, Leptobotia pellegrini thrives in clean, oxygen-rich water with steady current. Unlike the common Clown Loach, this species stays more streamlined and carries a more river-built profile. It is highly social and active, constantly exploring the substrate, weaving through rockwork, and interacting with tank mates.

Growing to approximately 8–10 inches, the Royal Clown Loach becomes a substantial bottom presence in larger community or river-style predator setups.

Aquarium Setup

• Minimum Tank Size: 125 gallons (180+ gallons recommended for groups)

• Group Size: 4 or more preferred

• Substrate: Sand or smooth gravel

• Flow: Moderate to strong current

• Décor: Rock piles, driftwood, shaded hiding areas

• Lighting: Moderate

• Filtration: Strong biological filtration required

• Oxygen: High dissolved oxygen essential

Tank Mates

Best with medium to large, non-aggressive species:

• Larger barbs

• Rainbowfish

• Peaceful cichlids

• Larger tetras

• Non-aggressive catfish

Avoid highly aggressive predators and very small fish.

Water Parameters

• Temperature: 68–75°F (20–24°C)

• pH: 6.5–7.5

• Hardness: Soft to medium

• Water Quality: Clean, well-oxygenated, and stable conditions critical

Diet

Omnivorous:

• Sinking pellets

• Frozen bloodworms and brine shrimp

• Small crustaceans

• Occasional vegetable matter