L519 Honeycomb Bristlenose Pleco (Ancistrus sp. L519)

A rare compact Bristlenose Pleco with a bold black honeycomb pattern over a warm reddish-brown body, originating from the Río Iténez drainage of South America.

The L519 Honeycomb Bristlenose Pleco, scientifically designated Ancistrus sp. L519, is an uncommon L-number pleco prized for its unusual reticulated pattern, manageable adult size, and classic Bristlenose personality.

It is also known in specialist pleco circles as Río Iténez Ancistrus, L519 Bristlenose, and Ancistrus “Kiefneri II”. Unlike many ornamental plecos that grow much larger than customers expect, L519 remains relatively compact at approximately 10–11 cm as an adult.

One of its most attractive features is the coarse dark honeycomb or net-like pattern covering a reddish-brown to brown base colour. Younger specimens can be especially striking, but unlike some patterned Ancistrus, mature L519 can retain an attractive and recognizable pattern into adulthood.

Why this pleco stands out

• True L519 Ancistrus rather than a generic “Honeycomb Pleco”
• Bold black reticulated or honeycomb body pattern
• Warm reddish-brown base coloration
• Compact adult size of approximately 10–11 cm
• Peaceful community-friendly temperament
• Natural algae and biofilm grazing behavior
• Mature males develop classic Bristlenose facial tentacles
• Excellent breeding project for Ancistrus and L-number collectors

Best for

• Pleco collectors
• Bristlenose enthusiasts
• Planted community aquariums
• Aquarists looking for a smaller ornamental pleco
• Ancistrus breeding projects
• Aquarists looking for uncommon L-number plecos in Canada

Topick Aquarium Insight

L519 is a particularly good choice for aquarists who want something more unusual than a standard Brown, Albino, or Super Red Bristlenose without moving into the much larger and more demanding pleco species.

Its biggest advantage is the combination of ornamental pattern and manageable adult size. It has the body shape, grazing behavior, cave use, and breeding behavior people enjoy in Ancistrus, but the honeycomb pattern gives it a much more collector-grade appearance.

However, we do not recommend buying L519 simply as an “algae cleaner.” Algae and biofilm are useful parts of its natural feeding behavior, but a healthy pleco still requires regular complete feeding.

What Is L519?

L519 is an L-number assigned to an Ancistrus form from the Río Iténez drainage. The fish has not yet received a formally described scientific species name, so the correct practical designation remains Ancistrus sp. L519.

Specialist references also use names such as Ancistrus sp. “Río Iténez” and Ancistrus “Kiefneri II”.

The L-number is important because several different Ancistrus are sold under generic names such as “Honeycomb Pleco”. A true L519 should therefore be identified by its L-number and known lineage rather than by the Honeycomb name alone.

L519 vs L089 Honeycomb Pleco

L519 is not the only Ancistrus that has been called a Honeycomb Pleco. L089 is another distinct Ancistrus that has long been known as Honeycomb Patterned Ancistrus or Ancistrus “Wabenmuster”.

These L-numbers should not be treated as interchangeable.

• L519: Río Iténez form with a coarse dark reticulated pattern over a reddish-brown background
• L089: a separate Ancistrus form known for large cream-coloured markings that can produce a honeycomb-like appearance

For collectors and breeding projects, purchasing fish identified by the correct L-number is much more reliable than relying only on the common name “Honeycomb Bristlenose”.

Appearance

L519 has a broad Ancistrus body with a dark, coarse reticulated pattern across a reddish-brown to brown base. The markings can resemble an irregular honeycomb, net, or interconnected maze.

Juveniles are often especially colourful and high-contrast. As the fish matures, the overall pattern remains recognizable, although colour intensity naturally varies with age, mood, lighting, substrate, and individual genetics.

Mature males develop prominent fleshy tentacles or “bristles” across the snout and top of the head. Females usually develop much less extensive facial bristling, with any tentacles generally smaller and more concentrated near the edge of the snout.

Behavior & Temperament

L519 is generally peaceful toward normal community fish. It spends much of its time grazing surfaces, resting beneath wood, and exploring caves and shaded areas.

Like many Ancistrus, mature males can become territorial around preferred caves or feeding areas, especially when breeding. This usually does not prevent multiple fish from being kept together when sufficient floor space, caves, and visual barriers are provided.

Midwater fish such as tetras and rasboras are normally ignored.

Tank Setup

A mature aquarium with good filtration, oxygenation, wood, caves, and plenty of surfaces for biofilm growth is ideal.

• 20 gallons or larger recommended for a single adult or pair
• Larger footprint recommended for multiple adults
• Provide at least one suitable cave per territorial adult male
• Driftwood and natural hardscape provide useful grazing surfaces
• Plants are generally compatible
• Good biological filtration strongly recommended
• Moderate water movement and good oxygenation
• Maintain clean, stable water conditions

Smooth caves with one main entrance are particularly useful when breeding. The male normally selects and guards a suitable cavity.

Water Parameters

• Scientific / Trade Designation: Ancistrus sp. L519
• Common Name: L519 Honeycomb Bristlenose Pleco
• Other Names: Río Iténez Ancistrus, L519 Bristlenose, Ancistrus “Kiefneri II”
• Family: Loricariidae
• Origin: Río Iténez drainage, Bolivia
• Adult Size: approximately 10–11 cm
• Temperature: approximately 23–28°C
• pH: approximately 5.5–7.5
• Temperament: Peaceful; males can be territorial around caves
• Diet: Omnivorous grazer with strong plant-material component
• Care Level: Beginner to Intermediate

L519 is reasonably adaptable once established. Consistent maintenance, good oxygenation, and stable water conditions are more important than constantly adjusting the aquarium to reach one exact pH value.

Feeding

L519 naturally grazes algae, biofilm, microorganisms, and organic material from aquarium surfaces, but algae growing in a home aquarium is not a complete diet.

Offer a varied diet including:

• High-quality algae wafers
• Spirulina-based sinking foods
• Quality pleco and Ancistrus pellets
• Blanched zucchini
• Green beans
• Other suitable vegetables
• Occasional protein-containing sinking foods
• Natural biofilm and grazing surfaces

A common mistake is overfeeding high-protein carnivore foods because the fish readily accepts them. Ancistrus should receive plenty of plant-based material and fibre as part of a balanced diet.

Feed after lights dim if community fish are consuming most of the food before the pleco has a chance to eat.

Is L519 a Good Algae Eater?

L519 is a natural algae and biofilm grazer and can help remove softer algae from aquarium surfaces.

However, it should not be purchased as a substitute for aquarium maintenance. It may not consume every type of algae, and a well-fed L519 still needs dedicated sinking foods and vegetables.

Think of algae grazing as part of its natural behavior rather than its job in the aquarium.

Tank Mates

L519 works well with a wide range of peaceful tropical fish.

• Tetras
• Rasboras
• Cory-type catfish
• Peaceful rainbowfish
• Guppies and other peaceful livebearers
• Peaceful gouramis
• Dwarf cichlids in suitably structured aquariums
• Adult freshwater shrimp

Avoid very aggressive bottom dwellers that may prevent the pleco from accessing caves or food.

When keeping several Ancistrus males together, provide multiple caves and visual barriers to reduce territorial disputes.

Shrimp & Snail Compatibility

L519 is generally compatible with adult Neocaridina, Caridina, Amano Shrimp, and peaceful freshwater snails.

It is not a specialized shrimp predator. Extremely small shrimplets can never be guaranteed safe with any omnivorous fish, but adult shrimp are normally ignored.

Male vs Female L519

Sex becomes easier to determine as the fish matures.

• Males: develop larger and more numerous tentacles extending across the snout and upper head
• Females: normally have very small bristles or none beyond the margins of the snout and often develop a broader abdomen when mature

Small juveniles should not be sold with guaranteed sex unless the differences are already clearly visible.

Breeding

L519 can be bred in aquariums and follows the typical cave-spawning reproductive strategy associated with Ancistrus.

A mature male selects and cleans a cave. After spawning, the female leaves the cavity and the male remains inside guarding and fanning the egg cluster.

Once the fry absorb their yolk sacs and begin leaving the cave, they can be offered biofilm, soft vegetable foods, quality powdered or crushed pleco foods, and appropriately sized sinking foods.

Good oxygenation is particularly important around occupied breeding caves.

Does L519 Need Driftwood?

Driftwood is highly recommended because it creates cover, grazing area, and natural biofilm and helps produce the type of structured environment Ancistrus use comfortably.

We do not recommend treating wood as a substitute for a complete diet. The fish should still receive proper vegetable-based and formulated foods.

Canada-Wide Live Fish Shipping

L519 Honeycomb Bristlenose Pleco is available from Topick Aquarium in Canada when in stock. Local pickup is available in Markham, Ontario, and Canada-wide live fish shipping may be available depending on weather, route, size, and livestock condition.

Important Note

L519 remains an undescribed Ancistrus species, so Ancistrus sp. L519 is currently the appropriate scientific/trade designation.

“Honeycomb Bristlenose” is not unique to L519. Other Ancistrus, particularly L089 and unidentified Honeycomb forms, may be sold under similar common names. For collectors and breeding projects, the L-number and source lineage are therefore more meaningful than the common name alone.

Individual colour, pattern density, and contrast naturally vary with age, condition, lighting, substrate, and genetics. Unless specifically listed as WYSIWYG, product photos should be considered representative of the offered L519 line.

FAQ

What is an L519 Honeycomb Bristlenose Pleco?
L519 is a small ornamental Ancistrus from the Río Iténez drainage, known for its dark honeycomb or reticulated pattern over a reddish-brown body.

What is the scientific name of L519?
The fish has not yet received a formally described species name. Its current designation is Ancistrus sp. L519.

Is L519 the same as a regular Honeycomb Bristlenose?
Not necessarily. “Honeycomb” is used for several Ancistrus forms. A true L519 should be identified specifically as Ancistrus sp. L519 rather than by the Honeycomb common name alone.

Is L519 the same as L089?
No. L519 and L089 are different Ancistrus forms. Both may be described as Honeycomb Plecos in the aquarium trade, which is why the L-number is important for correct identification.

How big does L519 get?
Adult L519 generally reach approximately 10–11 cm, making them a relatively compact Bristlenose Pleco.

Is L519 a good algae eater?
Yes, it naturally grazes algae and biofilm, but it still requires regular complete feeding. It should not be expected to survive entirely on aquarium algae.

Does L519 need driftwood?
Driftwood is strongly recommended as cover and a biofilm-rich grazing surface, but it does not replace a balanced pleco diet.

Can L519 live in a community aquarium?
Yes. L519 is generally peaceful with normal community fish. Adult males may defend preferred caves from other plecos, especially during breeding.

Can L519 live with shrimp?
Adult freshwater shrimp are generally compatible. L519 is not a specialized shrimp predator, although newborn shrimplets can never be guaranteed completely safe with fish.

How can I tell male and female L519 apart?
Mature males develop stronger facial tentacles extending across the snout and upper head. Females generally have much smaller bristles concentrated near the edge of the snout.

Can L519 Bristlenose Plecos breed in aquariums?
Yes. They are cave spawners. The male guards and fans the eggs inside a suitable cave until the fry develop.

Is L519 beginner-friendly?
Once established, L519 is relatively manageable for aquarists who can provide stable clean water, proper feeding, good oxygenation, caves, and sufficient space. Its rarity makes careful identification and long-term care especially worthwhile.