L239 Blue Panaque - (Baryancistrus beggini)

Fish Details, Description and Information Below:

🔵 L239 Blue Panaque – (Baryancistrus beggini) – Wild-Caught Upper Orinoco Pleco

Name: L239 Blue Panaque For Sale Online (Baryancistrus beggini)
SKU: 68751
Price: 50.0 USD
Availability: InStock

The L239 Blue Panaque (Baryancistrus beggini), also known as the Blue Fin Panaque or Blue Pleco, is one of the most unusual blue-colored plecos in the aquarium hobby.

Despite the common name:

BLUE PANAQUE

this fish is:

NOT A TRUE Panaque

The species was formally described in 2009 as:

Baryancistrus beggini

L239 is best known for its nearly uniform:

Charcoal gray
Dark brown
Black
Blue-black

body covered by an attractive:

TURQUOISE-BLUE SHEEN

The blue coloration can be especially strong on the:

Pectoral fins
Pelvic fins
Dorsal fin
Flanks
Tail

Under the right lighting, a healthy specimen can appear almost:

VELVET BLUE

Unlike many other collectible plecos, the L239 is not primarily decorated with bold:

Spots
Stripes
Zebra bands
Yellow fin seams

Its beauty comes from its unusual solid dark coloration and shimmering blue finish.

The species originates from the upper Rio Orinoco region of Venezuela and Colombia, where it inhabits cracks and spaces between large granite rocks and boulders in warm, flowing, highly oxygenated water.

Its natural diet consists primarily of:

PERIPHYTON / AUFWUCHS AND ASSOCIATED MICROFAUNA

grazed from rock surfaces.

This means L239 should receive a varied diet containing:

Algae-based foods
Plant foods
Biofilm-oriented foods
Quality sinking omnivore foods
Modest animal and insect protein

It should not be treated as a wood-eating Panaque, and driftwood should not be presented as a major dietary requirement.

This listing is for:

WILD-CAUGHT L239 BLUE PANAQUES

🔎 Quick Facts – L239 Blue Panaque

📛 Common Name: Blue Panaque
📛 Other Names: Blue Fin Panaque, Blue Pleco, L239 Pleco
🔢 L-Number: L239
🔬 Scientific Name: Baryancistrus beggini
📅 Formally Described: 2009
🐟 Family: Loricariidae
🧬 Subfamily: Hypostominae
🌿 Stock: Wild Caught
📏 Current Size: Approximately 2–3 inches
🌎 Origin: South America
🇻🇪 Country: Venezuela
🇨🇴 Country: Colombia
🌊 Native Drainage: Upper Rio Orinoco Basin
📍 Venezuela: Rio Orinoco and lower Rio Ventuari
📍 Colombia: Lower Rio Guaviare and associated Orinoco drainage
🪨 Natural Habitat: Granite bedrock, boulders, cracks and rocky interstitial spaces
💧 Water Type: Freshwater
📏 Scientific Maximum: Approximately 8.1 cm / 3.2 inches standard length in the original description
📏 Adult Planning Size: Approximately 4–6 inches total length
🏠 Recommended Aquarium: 40 gallons or larger
👥 Multiple Adults: 55+ gallons with substantial bottom territory
🌡️ Temperature: Approximately 79–86°F
💧 pH: Approximately 5.5–7.5
💦 Water: Soft to moderately mineralized
💨 Oxygenation: High
🌊 Water Movement: Moderate to Strong
🍽️ Diet: Omnivorous Aufwuchs / Periphyton Grazer
🌿 Algae & Plant Foods: Important
🦐 Animal / Insect Protein: Supplemental
🪵 Driftwood: Useful for shelter but not a specialized dietary requirement
🚫 Algae Cleaner: Should not be purchased solely for algae control
😌 Temperament: Peaceful toward most midwater fish
⚠️ Pleco Temperament: Adults can be strongly territorial toward similar plecos
🌙 Activity: Primarily crepuscular / nocturnal
🥚 Breeding: Cave Spawner
👨‍👧 Parental Care: Male guards eggs and fry
⭐ Care Level: Intermediate
🚨 Conservation Status: Vulnerable

🧬 Formally Described Species

L239 originally entered the aquarium hobby without a scientific species name.

It was known simply as:

L239

or:

Blue Panaque

In:

2009

Nathan Lujan, Mariangeles Arce, and Jonathan Armbruster formally described the fish as:

Baryancistrus beggini

The accepted modern product identification is therefore:

**L239 Blue Panaque – (Baryancistrus beggini)**

⚠️ The Name “Blue Panaque” Is a Trade Name

Despite being called the:

BLUE PANAQUE

this species does not belong to the genus:

Panaque

The name became established in the aquarium hobby before its scientific identity was resolved.

It is currently classified as:

Baryancistrus beggini

Therefore, “Blue Panaque” should be treated as a:

COMMON / TRADE NAME

rather than a scientific description of its genus.

🔵 Important Appearance Correction

The older product page describes L239 as having:

“Iridescent blue spots.”

I would remove that.

The original scientific description states that live fish are:

DARK GRAY TO BLACK

with a:

TURQUOISE-BLUE SHEEN

across the:

Fins
Flanks

The blue coloration is therefore better described as:

A SHEEN OR IRIDESCENT WASH

rather than blue spots.

🎨 Appearance

Typical body coloration includes:

Charcoal gray
Very dark brown
Black
Blue-black

with a metallic or iridescent:

Turquoise
Cobalt-blue
Slate-blue
Blue-green

sheen.

The appearance can change dramatically depending on:

Light angle
Aquarium lighting
Stress
Background color
Water conditions
Fish condition

💙 Blue Fins

The fins are among the most attractive features of L239.

Healthy specimens can show intense blue coloration through the:

Pectoral fins
Pelvic fins
Dorsal fin
Caudal fin

Some individuals appear almost:

ELECTRIC BLUE

when viewed under suitable aquarium lighting.

♂️ Males May Become More Intensely Blue

The original scientific description notes that the:

BLUE SHEEN WAS MORE INTENSE IN SOME ADULTS

which researchers considered likely to be:

MALES

This does not mean every male will be dramatically brighter than every female.

Color intensity alone should:

NOT

be used as a guaranteed sexing method.

⚠️ Color Disclaimer

Exact blue coloration cannot be guaranteed.

Individual fish may appear:

Dark gray
Blue-gray
Charcoal
Black
Turquoise-blue
Blue-green

depending on:

Genetics
Age
Sex
Stress
Lighting
Aquarium background
Diet
Water quality

Newly imported wild fish may initially look much darker or duller than established specimens.

🧬 What Does beggini Mean?

The species name:

beggini

honors:

Chris Beggin

who supported the scientific research that resulted in the species being formally described.

The original authors specifically recognized his:

Financial support of the research
Ethical ornamental-fish business practices
Positive influence on the professional development of the lead author

🌎 Native Distribution

Baryancistrus beggini is native to the:

UPPER RIO ORINOCO BASIN

of:

🇻🇪 Venezuela
🇨🇴 Colombia

🇻🇪 Venezuela

Scientific records include:

RIO VENTUARI

and the:

RIO ORINOCO

around the Ventuari–Orinoco region.

The holotype was collected from the:

RIO VENTUARI

in Amazonas State, Venezuela.

🇨🇴 Colombia

The species is also scientifically documented from portions of the:

RIO GUAVIARE

and other Colombian portions of the upper Orinoco drainage.

Therefore, describing the fish as exclusively Venezuelan is too restrictive.

The better origin is:

UPPER ORINOCO BASIN – VENEZUELA & COLOMBIA

🪨 Natural Habitat

L239 inhabits:

GRANITIC BEDROCK AND BOULDER HABITAT

associated with exposed portions of the:

GUIANA SHIELD

The fish lives in:

Cracks
Crevices
Spaces between boulders
Spaces beneath rocks
Interstitial rocky habitat

🪨 A Rock-Dwelling Pleco

L239 should be thought of primarily as a:

ROCK-DWELLING RIVER PLECO

rather than a wood-dwelling species.

Its aquarium should therefore contain substantial:

Rocks
Slate
Caves
Crevices

with driftwood used as an optional additional structure.

🌊 Flowing Water

The natural habitat consists of flowing tropical river environments.

In captivity, provide:

MODERATE TO STRONG WATER MOVEMENT

with areas where fish can retreat behind:

Rocks
Caves
Wood

The entire aquarium does not need to be an uncontrolled torrent.

💨 HIGH OXYGENATION

L239 prefers:

WARM, HIGHLY OXYGENATED WATER

This combination is especially important because warm water naturally holds less dissolved oxygen.

Recommended methods include:

Strong surface agitation
Air stones
Powerheads
Circulation pumps
Canister-filter returns
Sump filtration

🌡️ Temperature

A practical aquarium range is:

79–86°F / 26–30°C

This is warmer than the older:

74–82°F

recommendation.

A good general target is approximately:

80–84°F

with strong oxygenation.

💧 Water Parameters

A practical long-term range is:

🌡️ Temperature: 79–86°F
💧 pH: Approximately 5.5–7.5
💦 Hardness: Soft to moderately mineralized
💨 Oxygenation: High
🌊 Flow: Moderate to Strong
☠️ Ammonia: 0 ppm
☠️ Nitrite: 0 ppm
🔄 Nitrate: Keep low

Stable water quality is particularly important with wild-caught specimens.

⚠️ Sensitive to Poor Water Quality

L239 should not be treated like a highly adaptable Common Pleco.

Avoid:

Poor oxygenation
Excess organic waste
Elevated nitrate
Dirty substrate
Sudden chemistry changes

Regular partial water changes are strongly recommended.

📏 Adult Size

The original scientific description examined:

98 SPECIMENS

and recorded a maximum:

80.9 MM STANDARD LENGTH

or approximately:

3.2 INCHES BEFORE THE TAIL

📏 Aquarium Adult Size

Specialist aquarium records commonly place mature L239 at approximately:

12–15 CM TOTAL LENGTH

or roughly:

4.7–5.9 INCHES

Therefore, for responsible aquarium planning:

EXPECT APPROXIMATELY 4–6 INCHES TOTAL LENGTH

⚠️ Why Scientific & Aquarium Sizes Differ

The scientific maximum refers to:

STANDARD LENGTH

which excludes the full caudal fin.

It also reflects the specimens available to scientists during the original description.

Aquarium and specialist field records can include larger living adults.

For customer planning:

4–6 INCHES

is safer than either:

3 inches

or:

assuming every fish reaches exactly 6 inches.

🏠 Aquarium Size

The current 55-gallon recommendation is generous for a single fish.

For one adult:

40 GALLONS OR LARGER

can work well when properly filtered and structured.

For:

Multiple L239
Breeding groups
Other territorial plecos

I recommend:

55 GALLONS OR LARGER

📐 Bottom Area Matters

L239 spends most of its life around:

Rockwork
Caves
Substrate

so aquarium:

LENGTH + WIDTH

matter more than excessive height.

A larger bottom footprint provides:

More caves
More territories
More feeding surfaces
Less territorial conflict

🪨 Aquarium Setup

A good L239 aquarium should contain:

Large smooth rocks
Rounded boulders
Slate
Rock cracks
Ceramic caves
Low shelters
Sand or smooth gravel
Good circulation
High oxygenation
Strong filtration

🏠 Provide Multiple Caves

Even though wild L239 use natural rock fissures rather than ceramic tubes, pleco caves work well in captivity.

Provide:

MORE SHELTERS THAN PLECOS

when keeping several individuals.

Suitable shelters include:

Ceramic pleco caves
Slate caves
Rock crevices
Tight overhangs
One-ended tubes

🪵 Driftwood – Useful, But Not a Wood-Eating Panaque

Because of the common name:

BLUE PANAQUE

customers may assume L239 requires large amounts of wood in its diet.

That is incorrect.

L239 is:

NOT A TRUE Panaque

and the scientific stomach-content observations point instead toward:

PERIPHYTON AND ASSOCIATED MICROFAUNA

grazed from rock surfaces.

Driftwood can still provide:

Shelter
Shade
Biofilm
Territory

but should not be treated as a dietary necessity.

🚫 Remove “Wood Fibers” as a Main Diet Item

The older listing says L239 enjoys:

“wood fibers.”

I would remove that from the primary diet description.

This species is better characterized as:

AN AUFWUCHS / PERIPHYTON GRAZER

rather than a wood-eating pleco.

🍽️ Diet – Omnivorous Aufwuchs / Periphyton Grazer

The original scientific examination of stomach contents found that L239 feeds on:

PERIPHYTON

and:

ASSOCIATED MICROFAUNA

on rocky surfaces.

🔬 What Is Periphyton?

Periphyton is the complex biological growth found on submerged surfaces.

It can contain:

Algae
Bacteria
Biofilm
Detritus
Microorganisms
Protozoans
Small crustaceans
Insect larvae
Other tiny invertebrates

Therefore, L239 is not accurately described as strictly:

Herbivorous

or strictly:

Carnivorous.

🌿 Plant & Algae Foods

Suitable foods include:

High-quality algae wafers
Spirulina wafers
Vegetable-containing sinking pellets
Quality gel foods
Zucchini
Squash
Green beans

These provide an important plant component.

🦐 Animal & Insect Foods

The microfauna component of its natural diet means some protein should also be provided.

Suitable foods include:

Mysis shrimp
Brine shrimp
Bloodworms
Mosquito larvae
Insect-based sinking pellets
Small amounts of chopped shrimp
Quality omnivore tablets

⚖️ Balanced Feeding

The best long-term approach is:

ALGAE / PLANT FOODS + BIOFILM + SMALL ANIMAL / INSECT FOODS

rather than an extreme diet.

Do not feed only:

Vegetables

or only:

High-protein carnivore foods.

🚫 Not Just an Algae Cleaner

L239 does naturally graze algae-containing biological growth.

However:

DO NOT PURCHASE IT SIMPLY TO CLEAN AN AQUARIUM

It requires intentional feeding.

Aquarium algae alone is not enough to support proper long-term nutrition.

🌙 Behavior

The Blue Panaque is generally:

CREPUSCULAR / NOCTURNAL

and may remain hidden during bright daylight.

Activity normally increases:

At dusk
During feeding
After lights dim
At night

Established specimens can become more confident during daytime.

🧪 Wild-Caught Acclimation

This listing is for:

WILD-CAUGHT L239 BLUE PANAQUES

Wild specimens deserve careful acclimation.

After arrival:

Provide immediate rock shelters
Keep lighting subdued
Maintain very high oxygen
Avoid abrupt temperature changes
Avoid abrupt pH changes
Maintain excellent filtration
Confirm feeding

⚠️ Watch for a Sunken Belly

Imported L239 can sometimes arrive:

Thin
Stressed
Reluctant to feed

Watch carefully for:

Sunken abdomen
Hollow body profile
Loss of muscle
Persistent refusal to eat

🍽️ Make Sure Each Fish Gets Food

L239 can be outcompeted by:

Aggressive cichlids
Large plecos
Fast bottom feeders

Offer food:

Close to shelters
At dusk
After lights out
In several different locations

😌 Temperament Toward Other Fish

L239 is generally:

PEACEFUL

toward most midwater fish.

Potential tankmates include appropriately selected:

Tetras
Characins
Peaceful cichlids
Other compatible warm-water fish

⚠️ Territorial Toward Other Plecos

The biggest temperament concern is:

OTHER BOTTOM-DWELLING PLECOS

Adult L239 can become strongly territorial toward:

Other L239
Other Baryancistrus
Similar cave-dwelling plecos

⚔️ Do Not Overcrowd

More than one adult in insufficient bottom space can result in:

Persistent chasing
Cave blocking
Pushing
Fin damage
Odontode injuries

Provide:

Multiple caves
Multiple feeding locations
Visual barriers
Adequate bottom territory

♂️ Male vs. Female

Sexing L239 can be challenging.

Mature Males May Develop:

Slightly broader heads
More pronounced odontodes behind the gill covers
Stronger pectoral-fin odontodes
Increased territorial behavior

The blue sheen may also be more intense in some mature males.

Mature Females May:

Develop fuller abdomens when carrying eggs
Show subtle differences around the genital papilla

However:

L239 IS NOT ONE OF THE EASIEST PLECOS TO SEX VISUALLY

Unless confidently determined:

SELL AS UNSEXED

🥚 Captive Breeding – Confirmed

L239 has been:

SUCCESSFULLY BRED IN CAPTIVITY

although captive spawning remains:

UNCOMMON

compared with many smaller Hypancistrus or Ancistrus.

The first widely reported breeding success involved:

BASEL ZOO

and additional private breeders have since reproduced the species.

🏠 Cave Spawner

L239 is a:

CAVE-SPAWNING PLECO

Provide several caves with:

Different diameters
Different lengths
Strong water movement near the entrance

The male usually selects a preferred breeding cave.

💕 Spawning Behavior

Typical breeding behavior includes:

The male establishes a cave.
A receptive female enters.
Spawning occurs inside the cave.
Eggs are deposited and fertilized.
The female leaves.
The male remains with the clutch.

👨‍👧 Male Parental Care

After spawning:

THE MALE GUARDS THE EGGS

He:

Protects the clutch
Fans the eggs
Maintains water movement
Guards the developing fry

⚠️ Fry Can Be Difficult

Specialist breeding accounts note that getting L239 to spawn is only part of the challenge.

Maintaining high survival among fry may also require:

Extremely clean water
High oxygenation
Frequent feeding
Stable temperatures
Careful waste removal

For that reason, L239 breeding should be considered:

AN INTERMEDIATE TO ADVANCED PROJECT

💧 Breeding Conditions

Successful breeding is associated with:

Warm water
High dissolved oxygen
Good circulation
Excellent water quality
Suitable caves
Well-conditioned adults
A varied diet

Avoid assuming there is one exact guaranteed spawning formula.

🧬 Preserve L239 Lines

If breeding:

Preserve L239 identification
Preserve collection locality when known
Keep records of parent fish
Avoid mixing with similar Baryancistrus

Accurate records are especially valuable because L239 has a:

RESTRICTED NATURAL DISTRIBUTION

and is currently considered Vulnerable.

🚨 Conservation Status – Vulnerable

Baryancistrus beggini is currently assessed as:

VULNERABLE

on the IUCN Red List.

The assessment category is:

VU – B1ab(iii,v)

⚠️ Why Vulnerable?

The species occupies a relatively restricted portion of the:

UPPER ORINOCO REGION

and conservation concerns include:

Limited geographic range
Declining habitat quality
Pressure on mature populations
Ornamental-fish collection from a restricted area

⚠️ Vulnerable Does Not Automatically Mean Illegal

An IUCN:

VULNERABLE

classification is a conservation assessment.

It does not automatically mean the species is:

CITES listed
Illegal to own in the United States
Federally prohibited
Illegal to sell domestically

Those are separate legal designations.

However, responsible sourcing and long-term care are especially important for:

WILD-CAUGHT L239

🌱 Captive Breeding Is Valuable

Successful captive breeding can help:

Reduce future reliance on wild collection
Preserve aquarium lineages
Increase biological knowledge
Improve long-term hobby availability

L239 is therefore an especially worthwhile breeding project for experienced pleco keepers.

⭐ Why Keep an L239 Blue Panaque?

The L239 combines:

🔵 Beautiful turquoise-blue sheen
⚫ Deep charcoal to black body
🪨 Granite-rock habitat specialization
🌊 Upper Orinoco origin
📏 Manageable approximately 4–6 inch adult size
🍽️ Interesting periphyton-grazing diet
🌙 Nocturnal personality
🥚 Confirmed captive breeding
👨‍👧 Male parental care
🧬 Formally described scientific identity
🚨 Vulnerable conservation status

into one of the most unusual blue plecos in the aquarium hobby.

⚠️ Important Considerations

Before purchasing an L239 Blue Panaque:

The correct scientific name is Baryancistrus beggini.
The species was formally described in 2009.
“Blue Panaque” is a trade name.
L239 is not actually a member of the genus Panaque.
The species originates from the upper Rio Orinoco Basin.
Its range includes Venezuela and Colombia.
Scientific records include the Rio Orinoco, Rio Ventuari, and lower Rio Guaviare.
Natural habitat consists largely of granite rocks, boulders, cracks, and crevices.
The species has a uniform dark body with a turquoise-blue sheen.
Do not describe L239 as naturally covered with blue spots.
This listing is for wild-caught fish.
The original description documented approximately 8.1 cm standard length.
Specialist aquarium records report larger total-length adults.
Plan for approximately 4–6 inches.
Provide approximately 40 gallons or larger for one adult.
Use 55+ gallons for multiple adults.
Provide substantial rockwork and multiple caves.
Maintain approximately 79–86°F.
Maintain high dissolved oxygen.
Provide moderate to strong water movement.
Keep ammonia and nitrite at zero.
Keep nitrate low.
Feed an omnivorous aufwuchs / periphyton-based diet.
Provide algae and plant foods.
Provide modest animal and insect protein.
Do not describe L239 as a specialized wood-eating pleco.
Driftwood is useful but not a dietary requirement.
Do not purchase L239 simply as an algae cleaner.
Expect territorial behavior toward similar plecos.
Captive breeding has been documented.
L239 is a cave spawner.
Males provide parental care.
The species is currently classified as Vulnerable.
Responsible sourcing is especially important for wild-caught specimens.
Never release aquarium fish into natural waterways.

🧬 Taxonomy

The currently accepted scientific name is:

Baryancistrus beggini Lujan, Arce & Armbruster, 2009

Classification:

Order: Siluriformes
Family: Loricariidae
Subfamily: Hypostominae
Genus: Baryancistrus
Species: beggini
L-Number: L239

The species was formally described from the:

UPPER RIO ORINOCO BASIN

of Venezuela and Colombia.

For this product, use:

**L239 Blue Panaque – (Baryancistrus beggini)**

🔢 L-Number & Common-Name Disclaimer

L239 remains the established aquarium designation for Baryancistrus beggini.

The common name:

BLUE PANAQUE

predates the species' formal scientific description.

Despite that common name:

THIS FISH IS NOT A TRUE Panaque

Always preserve:

L239
Scientific name
Collection locality when known
Supplier information
Breeder-line records

🚨 Vulnerable Species Disclaimer

Baryancistrus beggini is currently classified as:

VULNERABLE

on the IUCN Red List.

The IUCN conservation category does not automatically establish a legal prohibition on aquarium ownership or domestic trade.

Customers remain responsible for complying with all applicable:

Federal laws
State laws
Local regulations
Import requirements

Responsible sourcing and long-term care are especially important for wild-caught specimens.

🚚 Live Fish Shipping

Live fish are professionally packed for safe transport.

Shipping availability depends on:

Fish size
Destination
Weather conditions
Carrier availability
Applicable state and local regulations

Please review our Shipping & Payment Information and Live Arrival Guarantee / DOA Policy before ordering.

⚠️ Buyer Responsibility

Customers are responsible for confirming that Baryancistrus beggini may legally be purchased, possessed, transported, and received in their state or local jurisdiction before ordering.

Never release aquarium fish into natural waterways.