Species profile
Golden Nugget Pleco
Baryancistrus xanthellus
Semi aggressive
Hard care
450 L minimum aquarium
18–25 cm adult size
Bottom
Can be kept singly
About this species
General notes for hobby use.
A large, demanding rheophilic pleco. Small retail specimens are misleading: adult footprint, oxygen demand and territorial behaviour should drive housing recommendations.
Water parameters
Suggested general range for long-term care.
Temperature
26–30 °C
pH
5.5–7.5
GH
2–12 dGH
KH
Not yet documented
Flow preference
High
Data confidence
Verified
Behaviour
General behaviour traits used by TanksConnected compatibility checks.
Minimum group size
Can be kept singly
Tank zone
Bottom
Territory level
High
Predation risk
None
Bioload factor
4
Can be assertive and strongly territorial with other large plecos, particularly around food and caves. Provide multiple separated feeding areas and retreats.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Yes
Shrimp safe
Yes
Snail safe
Yes
Cave breeder
Yes
Digs substrate
No
Jump risk
Low
Natural history & care
Research-backed context for long-term aquarium care.
Lifespan
Not yet documented
Diet type
Omnivore
Minimum aquarium volume
450 L
Minimum footprint
150 × 60 cm
Accepted scientific name
Baryancistrus xanthellus
Alternative names
Gold Nugget Pleco, Golden Nugget Pleco, L018, L085, L177
Native range
Brazil, Rio Xingu and Iriri system.
Natural habitat
Rocky, warm, strongly oxygenated Xingu habitat. Requires powerful filtration, high oxygen, substantial current and numerous rock/wood retreats. Heat plus low oxygen is a major risk.
Diet & feeding
Aufwuchs grazer with a strong plant/algal component but also takes invertebrate material. Feed varied algae-rich wafers, vegetables and moderate protein foods. Ensure food reaches the fish after lights-out if needed.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Mature males generally develop stronger odontodes and broader heads; females are typically rounder when mature.
Breeding
Cave-spawning loricariid; males guard eggs in enclosed sites. Captive breeding is possible but adult size and territoriality demand substantial space.