🟡 L199 Yellowhead Zebra Pleco – (Hypancistrus furunculus) – Wild-Caught Upper Orinoco Pleco

The L199 Yellowhead Zebra Pleco (Hypancistrus furunculus), also known as the Yellow Zebra Pleco or Orinoco Zebra Pleco, is a beautifully patterned South American pleco distinguished by its contrasting dark zebra-like bands over a cream, tan, pale yellow, or yellowish background.

One of its most distinctive characteristics is the dark marking across the snout and between the eyes that resembles a:

BANDIT MASK

This marking is so distinctive that it inspired the scientific species name:

furunculus

which refers to a:

Petty Thief or Pilferer

because the dark facial band resembles a thief's mask.

L199 was originally introduced to the aquarium hobby through the L-number system and was later formally described in 2007 as:

Hypancistrus furunculus

The species originates from the upper Rio Orinoco drainage, particularly the Orinoco and lower Ventuari systems of southern Venezuela, with modern records also documenting the species in Colombia.

Unlike the L046 Zebra Pleco, L199 typically develops:

• Broader dark bands
• A cream to yellowish background
• A distinctive dark facial mask
• Fewer oblique body stripes
• More vertical banding toward the rear of the body and tail

The Yellowhead Zebra Pleco is a protein-leaning omnivore that feeds heavily on aquatic animal and insect-based foods. It should not be purchased simply as an algae-cleaning pleco.

This listing is for:

WILD-CAUGHT L199 YELLOWHEAD ZEBRA PLECOS

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🔎 Quick Facts – L199 Yellowhead Zebra Pleco

• 📛 Common Name: Yellowhead Zebra Pleco
• 📛 Other Names: Yellow Zebra Pleco, Orinoco Zebra Pleco, L199 Zebra Pleco
• 🔢 L-Number: L199 / L199
• 🔬 Scientific Name: Hypancistrus furunculus
• 📅 Formally Described: 2007
• 🐟 Family: Loricariidae
• 🧬 Subfamily: Hypostominae
• 🌿 Stock: Wild Caught
• 📏 Current Size: Approximately 3–3.5 inches
• 🌎 Origin: South America
• 🌊 Native Drainage: Upper Rio Orinoco Basin
• 🇻🇪 Primary Scientific Range: Southern Venezuela
• 🇨🇴 Additional Modern Records: Colombia
• 📍 Type Locality: Rio Orinoco at Cucue, Amazonas, Venezuela
• 🌊 Additional Native Habitat: Lower Rio Ventuari
• 💧 Water Type: Freshwater
• 📏 Adult Planning Size: Approximately 5–6 inches
• 🏠 Recommended Aquarium: 40 gallons or larger
• 👥 Groups / Breeding Colonies: 55+ gallons preferred with substantial bottom territory
• 🌡️ Temperature: Approximately 77–84°F
• 🌡️ Breeding Range: Often maintained toward 82–86°F
• 💧 pH: Approximately 5.5–7.5
• 💦 Water: Soft to moderately mineralized
• 💨 Oxygenation: High
• 🌊 Water Movement: Moderate to Strong
• 🍽️ Diet: Protein-Leaning Omnivore
• 🦐 Animal / Insect Foods: Important
• 🌿 Plant Foods: Supplemental
• 🚫 Algae Cleaner: No
• 😌 Temperament: Peaceful toward most midwater fish
• ⚠️ Pleco Temperament: Territorial around caves
• 🌙 Activity: Primarily crepuscular / nocturnal
• 🐠 Swimming Area: Bottom
• 🥚 Breeding: Cave Spawner
• 👨‍👧 Parental Care: Male guards eggs and fry
• ⭐ Care Level: Intermediate
• 🌎 Conservation Status: Least Concern

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🧬 Formally Described Species

For many years, this fish was known simply as:

Hypancistrus sp. L199

That changed in:

2007

when Jonathan Armbruster, Nathan Lujan, and Donald Taphorn formally described the species as:

Hypancistrus furunculus

Therefore, the correct modern identification is:

L199 Yellowhead Zebra Pleco – (Hypancistrus furunculus)

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🥷 What Does furunculus Mean?

The scientific name:

furunculus

comes from Latin and means approximately:

PETTY THIEF / PILFERER

The name refers to the distinctive:

DARK BAND BETWEEN THE EYES

which resembles the mask traditionally associated with a thief.

This dark facial marking is one of the most useful identification characteristics of L199.

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🎭 The Bandit Mask

The original scientific description specifically noted a dark:

E-SHAPED MARKING ON THE SNOUT

in front of and between the eyes.

Depending on the specimen and viewing angle, this marking can appear as:

• A dark mask
• An E-shaped marking
• Connected dark bars
• A broad black facial band

This feature is especially useful when distinguishing L199 from some other striped Orinoco Hypancistrus.

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🎨 Appearance

L199 develops a striking combination of:

• Black
• Dark charcoal
• Dark gray
• Chocolate-brown

bands over a background that may appear:

• Pale yellow
• Cream
• Tan
• Beige
• Light gray

The aquarium name:

YELLOWHEAD ZEBRA PLECO

comes from the warmer yellow or cream coloration frequently visible on the head and body.

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⚠️ Not Every L199 Is Bright Yellow

The name:

Yellowhead Zebra Pleco

is an aquarium-trade name.

The original scientific description describes the underlying coloration more conservatively as:

WHITE TO LIGHT CREAM

with the species also differing from L046 Hypancistrus zebra by having a more:

TAN BACKGROUND

Therefore:

DO NOT GUARANTEE A BRIGHT YELLOW ADULT COLOR

Some individuals may appear:

• Yellowish
• Cream
• Beige
• Tan
• Nearly white

depending on genetics and environmental conditions.

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🦓 Zebra-Like Pattern

The characteristic L199 pattern includes:

• Dark oblique bars on the front half of the body
• Dark saddles and bars farther toward the rear
• Vertical bands on the caudal peduncle
• Vertical bands through the tail
• Complete dark bands through the dorsal fin

The transition between the front and rear pattern can be highly variable.

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🔄 Pattern Variation

Individual L199 may develop:

• Straight bands
• Broken bands
• Crescents
• Saddles
• Irregular markings
• Eye-like ocelli
• Partial stripes

No two fish necessarily develop identical patterns.

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👶 Juveniles Can Look More “Zebra-Like”

Young L199 frequently show stronger:

• Light-and-dark contrast
• Clean striping
• Zebra-like banding

As the fish matures, portions of the body pattern can become:

• More irregular
• More vertical
• More broken
• More complex

This is normal.

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⚠️ Color & Pattern Disclaimer

Exact adult pattern and coloration cannot be guaranteed.

Appearance can vary with:

• Genetics
• Age
• Collection locality
• Stress
• Shipping
• Lighting
• Aquarium background
• Diet
• Water quality

Wild fish may arrive looking considerably lighter or darker than they will after acclimation.

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🆚 L199 vs. L046 Zebra Pleco

L199 is sometimes confused with:

L046 Zebra Pleco – Hypancistrus zebra

They are:

DIFFERENT SPECIES

and come from completely different river systems.

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L199 – Hypancistrus furunculus

• Upper Rio Orinoco
• Venezuela / Colombia
• Cream, tan, or yellowish background
• Broader dark markings
• Distinctive facial mask
• Oblique bands primarily toward the front
• Vertical bands toward the rear

L046 – Hypancistrus zebra

• Rio Xingu, Brazil
• Strong black-and-white zebra pattern
• Oblique striping extends much farther through the body
• CITES Appendix II
• Critically Endangered
• Commercial wild-caught exports prohibited

L199 is:

NOT L046

and should never be sold or represented as an inexpensive “Zebra Pleco” substitute without its L-number clearly identified.

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🆚 L199 vs. L129

Another striped Orinoco species is:

L129 – Hypancistrus debilittera

L129 generally develops:

• Thinner pale markings
• More broken lines
• Vermiculations
• Less complete dorsal-fin bands
• A weaker or absent dark facial E-mark

L199 generally develops:

• Broader, clearer bars
• Complete dorsal-fin bands
• Stronger facial mask
• More organized stripe pattern

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🆚 L199 vs. L201

The:

L201 Orinoco Angel Pleco – Hypancistrus contradens

is also from the Orinoco system.

However, L201 is predominantly:

SPOTTED

rather than strongly zebra-banded.

L199 is characterized primarily by:

BANDS AND STRIPES

rather than a spotted body.

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🌎 Native Distribution

Hypancistrus furunculus was formally described from the:

UPPER RIO ORINOCO

of southern Venezuela.

Its scientifically documented Venezuelan range includes the:

• Main Rio Orinoco
• Lower Rio Ventuari

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📍 Type Locality

The type locality is:

CUCUE INDIGENOUS VILLAGE

on the:

RIO ORINOCO

approximately 60 km east of:

San Juan de Atabapo

in:

Amazonas State, Venezuela

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🌊 Scientific Range

The original species description documented L199 from the main Orinoco:

From Just West of San Fernando de Atabapo Upstream to the Mouth of the Ventuari

and from the:

Lower Ventuari River

upstream toward Canaripo.

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🇨🇴 Colombia Records

Although the original 2007 species description was based on Venezuelan specimens, modern fish inventories and taxonomic records also recognize:

Hypancistrus furunculus

from the:

ORINOCO BASIN OF COLOMBIA

This is not surprising because the upper Orinoco region spans international drainage boundaries and aquarium fish may also enter the trade through Colombian exporters.

For the product page, the safest origin is:

Upper Rio Orinoco Basin – Venezuela & Colombia

with the:

TYPE LOCALITY IN VENEZUELA

clearly identified.

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🪨 Natural Habitat

L199 is a:

ROCK-ASSOCIATED RIVER PLECO

The species has been collected around:

• Bedrock
• Rock outcrops
• Crevices
• River margins
• Moving water

The closely related Orinoco Hypancistrus species occupy rocky habitats where cracks and protected spaces provide daytime shelter.

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🌊 Current

Provide:

MODERATE TO STRONG WATER MOVEMENT

with sheltered areas where fish can rest.

A good aquarium contains:

🌊 Higher-Flow Areas

for:

• Oxygenation
• Waste transport
• Natural river behavior

and:

🪨 Protected Areas

around:

• Rocks
• Caves
• Driftwood

for resting.

The entire aquarium does not need violent current.

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💨 HIGH OXYGENATION

L199 thrives in:

WELL-OXYGENATED WATER

This becomes especially important because it prefers relatively warm tropical temperatures.

Useful methods include:

• Strong surface agitation
• Air stones
• Sponge filters
• Powerheads
• Canister-filter returns
• Sump returns

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🌡️ Temperature

A practical maintenance range is:

77–84°F / 25–29°C

For breeding, experienced keepers often maintain adults near:

82–86°F

provided dissolved oxygen remains very high.

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⚠️ Warm Water Requires More Oxygen

As aquarium temperature rises:

DISSOLVED OXYGEN DECREASES

Therefore, warm-water Hypancistrus aquariums should use:

• Strong aeration
• Surface movement
• Good circulation
• Reliable filtration

especially during hot weather.

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💧 Water Parameters

A practical aquarium range is:

• 🌡️ Temperature: 77–84°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

L199 does best in:

CLEAN, STABLE, MATURE AQUARIUMS

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⚠️ Sensitive to Poor Water Quality

L199 should not be treated like a large, highly adaptable Common Pleco.

It can react poorly to:

• Accumulated nitrate
• Low oxygen
• Excess organic waste
• Poor filtration
• Sudden chemistry changes

Regular partial water changes are important.

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📏 Adult Size – Important Correction

The older product page lists:

3–4 INCHES

as the maximum size.

That is too small.

Specialist references document adult L199 around:

12–15 CM

or approximately:

4.7–5.9 INCHES

Therefore, for responsible aquarium planning:

EXPECT APPROXIMATELY 5–6 INCHES

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⚠️ Scientific Description vs. Aquarium Adults

The original 2007 scientific description examined specimens only to:

65.5 MM STANDARD LENGTH

or approximately:

2.6 INCHES BEFORE THE TAIL

That does:

NOT

mean the species only reaches that size.

It simply reflects the largest preserved specimen available to the scientists in that study.

Larger mature aquarium and wild specimens are well documented by specialist L-number keepers.

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🏠 Aquarium Size

The older listing recommends:

20 GALLONS

I would increase that for permanent housing.

For one adult or a compatible pair:

40 GALLONS OR LARGER

is a much more comfortable long-term starting point.

For a group or breeding colony:

55 GALLONS OR LARGER

is preferred.

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📐 Bottom Area Matters More Than Height

L199 spends most of its life around:

• Rocks
• Caves
• Substrate

so prioritize:

AQUARIUM LENGTH + WIDTH

rather than excessive height.

A 40-gallon breeder-style footprint is especially useful.

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🪨 Aquarium Setup

A good L199 aquarium should include:

• Smooth rocks
• Slate
• Rock piles
• Narrow caves
• Ceramic pleco tubes
• Driftwood
• Sand or smooth gravel
• Shaded areas
• Strong filtration
• Good water movement
• High dissolved oxygen

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🏠 Caves Are Essential

Provide:

MORE CAVES THAN PLECOS

when maintaining a group.

Suitable shelters include:

• Ceramic pleco caves
• Slate caves
• Narrow rock crevices
• One-ended pleco tubes
• Driftwood cavities

Caves provide:

• Security
• Daytime shelter
• Territory
• Breeding sites

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🪵 Driftwood

Driftwood can be included for:

• Shelter
• Shade
• Biofilm
• Territory boundaries
• Natural structure

However:

L199 IS NOT A SPECIALIZED WOOD-EATING PLECO

Wood is not required for digestion and should not be considered its primary food.

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🍽️ Diet – Protein-Leaning Omnivore

One of the biggest corrections from the older page is diet.

L199 should not be described primarily as eating:

Algae Wafers + Vegetables

It is better described as a:

PROTEIN-LEANING OMNIVORE

with strong preference for:

• Aquatic invertebrate foods
• Insect foods
• Protein-rich sinking foods

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🦐 Recommended Protein Foods

Suitable foods include:

• Mysis shrimp
• Brine shrimp
• Bloodworms
• Black mosquito larvae
• White mosquito larvae
• Krill
• Cyclops
• Chopped shrimp
• Quality sinking carnivore pellets
• Insect-based pleco foods
• High-quality omnivore tablets

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🌿 Plant Foods

L199 may occasionally consume:

• Spirulina-containing foods
• Vegetable-based wafers
• Zucchini
• Cucumber
• Other appropriate vegetable foods

However:

PLANT FOODS SHOULD GENERALLY BE SUPPLEMENTAL

rather than the foundation of the diet.

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🚫 Not an Algae Cleaner

L199 is:

NOT AN ALGAE-CONTROL PLECO

It may occasionally graze:

• Biofilm
• Soft organic growth
• Small amounts of algae

but should not be expected to clean:

• Aquarium glass
• Rocks
• Decorations

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⚠️ Poor Food Competitor

L199 can be:

SHY AT FEEDING TIME

Aggressive or very fast tankmates may consume most of the food before the pleco emerges.

Feed:

• Near caves
• At dusk
• After lights dim
• In multiple locations

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🍽️ Monitor Body Condition

Watch for:

• Sunken abdomen
• Loss of body mass
• Hollow appearance
• Persistent refusal to eat

A fish can remain hidden and slowly lose condition without the keeper noticing.

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🌙 Activity

L199 is primarily:

CREPUSCULAR / NOCTURNAL

It commonly hides during bright daylight and becomes more active:

• At dusk
• During feeding
• After lights go out

Established specimens may eventually become more visible during the daytime.

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🧪 Wild-Caught Acclimation

This listing is for:

WILD-CAUGHT L199 YELLOWHEAD ZEBRA PLECOS

Wild fish deserve careful acclimation.

After arrival:

• Provide immediate caves
• Keep lighting subdued
• Maintain high oxygen
• Avoid abrupt temperature changes
• Avoid abrupt pH changes
• Maintain excellent filtration
• Confirm that every fish begins feeding

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😌 Temperament

Toward most peaceful midwater fish, L199 is generally:

PEACEFUL

Suitable tankmates may include appropriately selected:

• Tetras
• Pencilfish
• Small characins
• Peaceful dwarf cichlids
• Other calm warm-water fish

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⚠️ Territorial Around Caves

Adult males may defend:

• Breeding caves
• Favorite shelters
• Feeding locations

against other:

• L199s
• Hypancistrus
• Cave-dwelling plecos

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👥 Group Housing

L199 can be maintained in groups when adequate structure is provided.

For groups:

• Provide more caves than fish
• Create visual barriers
• Use several feeding areas
• Provide adequate floor space
• Avoid excessive pleco crowding

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⚠️ Avoid Aggressive Feeding Competition

Do not combine L199 with extremely aggressive bottom feeders that constantly outcompete them for food.

This species does best when it can feed calmly around its chosen territory.

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♂️ Male vs. Female

Sexing becomes easier in sexually mature fish.

Aquarium keepers commonly observe:

Mature Males

• Broader head
• Longer head profile
• Stronger cheek odontodes
• Stronger odontodes on the first pectoral-fin ray
• Increased body odontodes during breeding condition
• Strong cave territoriality

Mature Females

• Fuller abdominal profile
• Wider body when viewed from above when carrying eggs
• Less extensive odontode development

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🔬 Interesting Scientific Note on Sexing

The original 2007 species description reported:

NO SEXUAL DIMORPHISM OBSERVED

in the scientific specimens examined.

That does not mean males and females cannot be distinguished as fully mature aquarium fish.

The scientific collection consisted largely of relatively small preserved specimens, while mature aquarium breeders have documented clear odontode and body-shape differences.

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🥚 Captive Breeding – Confirmed

L199 has been:

SUCCESSFULLY BRED IN HOME AQUARIUMS

It is a:

CAVE-SPAWNING PLECO

and is considered a good species for aquarists interested in learning to breed Hypancistrus.

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🏠 Breeding Caves

Provide several caves of slightly different:

• Diameters
• Lengths
• Shapes

The preferred breeding cave is generally:

• Closed at one end
• Only slightly wider than the male
• Long enough for both fish during spawning
• Positioned in well-oxygenated water

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💕 Courtship

Typical spawning behavior includes:

1. The male establishes a cave.
2. A receptive female approaches.
3. The female enters the cave.
4. The pair may remain together for an extended period.
5. Eggs are deposited and fertilized.
6. The female leaves.
7. The male remains with the clutch.

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👨‍👧 Male Parental Care

After spawning:

THE MALE GUARDS THE EGGS

He:

• Blocks the cave entrance
• Fans the clutch
• Maintains water movement
• Protects developing embryos

The female generally takes no further part in brood care.

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🥚 Clutch Size

Documented aquarium breeding commonly produces approximately:

20–30 EGGS

although larger or smaller clutches are possible depending on:

• Female size
• Age
• Condition
• Genetics

Do not treat one clutch number as guaranteed.

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🐣 Hatching

At warm breeding temperatures, the eggs generally hatch after approximately:

ONE WEEK

Temperature and oxygenation can affect development time.

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👶 Fry

After hatching, fry retain large yolk sacs.

Once the yolk is absorbed, appropriate foods include:

• Baby brine shrimp
• Fine insect foods
• Crushed sinking carnivore pellets
• Fine omnivore foods
• Cyclops
• Small frozen foods

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⚠️ Fry Need Frequent Feeding

Young Hypancistrus can starve surprisingly quickly.

Provide food:

• Frequently
• In small portions
• Near fry shelters

while maintaining excellent water quality.

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💧 Breeding Conditions

Successful breeding is associated with:

• Warm water
• High dissolved oxygen
• Clean soft water
• Strong filtration
• Regular water changes
• Multiple caves
• Well-conditioned adults
• Protein-rich feeding

There is no single guaranteed breeding formula.

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🧬 Keep L199 Pure

There are several similar Orinoco Hypancistrus species.

Do not deliberately mix L199 with:

• L129
• L201
• L339
• Other unidentified Hypancistrus

if preserving pure species lines is the goal.

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⚠️ Hybridization Risk

Closely related Hypancistrus can potentially interbreed in captivity.

For breeding colonies:

KEEP ONE SPECIES / VERIFIED LINE PER AQUARIUM WHEN POSSIBLE

Offspring of mixed parentage should never be sold as pure L199.

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🌎 Conservation Status

Hypancistrus furunculus is currently assessed as:

LEAST CONCERN

The global assessment dates to:

2020

This does not mean wild populations should be treated as unlimited.

Responsible sourcing and proper permanent aquarium care remain important, especially for:

WILD-CAUGHT FISH

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⭐ Why Keep an L199 Yellowhead Zebra Pleco?

The L199 combines:

• 🟡 Cream to yellowish coloration
• ⚫ Bold dark zebra markings
• 🥷 Distinctive bandit-mask facial pattern
• 🌊 Upper Orinoco origin
• 📏 Manageable approximately 5–6 inch adult size
• 🦐 Protein-oriented feeding behavior
• 😌 Peaceful community temperament
• 🪨 Rock-and-cave lifestyle
• 🥚 Confirmed captive breeding
• 👨‍👧 Male parental care
• 🧬 Formally described scientific identity

into an excellent medium-sized pleco for aquarists interested in the genus Hypancistrus.

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⚠️ Important Considerations

Before purchasing an L199 Yellowhead Zebra Pleco:

• The correct scientific name is Hypancistrus furunculus.
• The species was formally described in 2007.
• L199 originates from the upper Rio Orinoco Basin.
• The type locality is in Amazonas, Venezuela.
• Modern records also document the species in Colombia.
• Preserve collection locality when known.
• The “Yellowhead” trade name does not guarantee a bright yellow fish.
• Natural coloration may be cream, tan, beige, or pale yellow.
• The dark facial band resembles a thief's mask and inspired the species name.
• Do not confuse L199 with L046 Zebra Pleco.
• Do not confuse L199 with L129 or L201.
• This listing is for wild-caught fish.
• Do not use 3–4 inches as the adult maximum.
• Plan for approximately 5–6 inches.
• Provide approximately 40 gallons or larger.
• Use 55+ gallons for groups or breeding colonies.
• Prioritize aquarium bottom area.
• Provide numerous caves.
• Maintain approximately 77–84°F.
• Maintain high dissolved oxygen.
• Provide moderate to strong water movement.
• Keep ammonia and nitrite at zero.
• Keep nitrate low.
• Feed a protein-leaning omnivorous diet.
• Provide regular animal and insect foods.
• Plant-based foods are supplemental.
• Do not purchase L199 as an algae cleaner.
• Feed shy fish near their caves.
• Expect territorial behavior around breeding caves.
• Captive breeding is well documented.
• Males guard the eggs and fry.
• Keep breeding lines separate from other Hypancistrus.
• Never release aquarium fish into natural waterways.

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🧬 Taxonomy

The currently accepted scientific name is:

Hypancistrus furunculus Armbruster, Lujan & Taphorn, 2007

Classification:

• Order: Siluriformes
• Family: Loricariidae
• Subfamily: Hypostominae
• Genus: Hypancistrus
• Species: furunculus
• L-Number: L199

The species was formally described from specimens collected in the:

UPPER RIO ORINOCO OF SOUTHERN VENEZUELA

For this product, use:

L199 Yellowhead Zebra Pleco – (Hypancistrus furunculus)

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🔢 L-Number Identification Disclaimer

L199 is the established aquarium designation for Hypancistrus furunculus.

Several other Orinoco Hypancistrus can look superficially similar.

Preserve:

• L-number
• Scientific name
• Collection locality when known
• Supplier identification
• Breeder-line information

when maintaining or breeding this species.

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🚚 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.

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⚠️ Buyer Responsibility

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

Never release aquarium fish into natural waterways.