Species profile
L191 Dull Eyed Royal Pleco
Panaque sp. L191
Peaceful
Hard care
550 L minimum aquarium
35–45 cm adult size
Bottom
Can be kept singly
About this species
General notes for hobby use.
L191 remains an undescribed Panaque form and should not be labelled Panaque nigrolineatus.
Water parameters
Suggested general range for long-term care.
Temperature
24–29 °C
pH
6–7.5
GH
2–15 dGH
KH
Not yet documented
Flow preference
Moderate–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
4.5
Territorial with other large Panaque and competing bottom fish; provide individual refuges and strong sight breaks.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Yes
Shrimp safe
Yes
Snail safe
Yes
Cave breeder
No
Digs substrate
No
Jump risk
Low
Natural history & care
Research-backed context for long-term aquarium care.
Lifespan
Not yet documented
Diet type
Herbivore
Minimum aquarium volume
550 L
Minimum footprint
180 × 60 cm
Accepted scientific name
Panaque sp. L191
Alternative names
Dull Eyed Royal Pleco, L191, Broken-line Royal Pleco
Native range
Colombia, Rio Caguán in the Caquetá drainage.
Natural habitat
Large wood-associated river loricariid. Provide a 180 cm+ aquarium, extensive driftwood, strong filtration, high oxygen and large open turning space.
Diet & feeding
Wood is an essential dietary component. Supplement with vegetable-rich sinking foods; large adults produce exceptionally heavy waste.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Reliable external sexing is difficult; mature males may show stronger odontodes.
Breeding
No routine home-aquarium breeding method is established for this large undescribed L-number form.