Gold Nugget Pleco 'Rio Xingu'

Gold Nugget Pleco (Baryancistrus xanthellus) L081

A bold and highly sought-after larger pleco from the fast-flowing, clear waters of the Rio Xingu in the Lower Amazon basin of Brazil. Known in the hobby by its L-number (L018) and nicknamed the “Gold Nugget Pleco” for its striking golden-yellow spots and seams that stand out dramatically against a darker body, this species combines impressive size with eye-catching patterning. It remains one of the most popular members of the Baryancistrus genus and is a favorite for enthusiasts with larger aquariums who appreciate its active foraging and the way it thrives in well-oxygenated, current-rich setups.

Key Features

• Maximum Size: 24 cm / ~9.4 inches SL.
• Appearance: Sturdy, armored body with distinctive golden-yellow “nugget” spots and seams that give the species its common name. The patterning can vary in intensity and coverage. Males and females show visual differences, with males typically developing more pronounced features as they mature.
• Fin Details: Typical for the genus, with strong pectoral spines and rounded fins suited to life in moderate to fast current.

Aquarium Care

• Tank Size: Minimum 75–125 gallons for a single specimen or small group (larger is strongly recommended due to adult size).
• Water Parameters: Tropical freshwater; 77–86°F (25–30°C), pH 6.4–7.6, soft to moderately hard. Excellent water quality, good oxygenation, and moderate to fast current are important. Provide sand or fine gravel, rocks, driftwood, and plenty of caves or hiding spots.
• Diet: Omnivorous — accepts high-quality sinking pellets, algae wafers, frozen foods (bloodworm, brine shrimp), and occasional vegetables. A varied diet supports health and coloration.
• Behavior: Generally peaceful but can be territorial with other plecos, especially in smaller tanks. Best kept singly or in small groups with adequate space and hiding spots. Excellent for larger planted or riverine biotope aquariums with other robust, peaceful fish. Breeding is possible in captivity, with males guarding eggs in caves.

IUCN Status Near Threatened (NT)