L333 King Tiger Pleco/Maze Zebra Pleco - (Hypancistrus Seideli)

Fish Details, Description and Information Below:

🐯 L333 King Tiger Pleco / Maze Zebra Pleco – (Hypancistrus seideli)

The L333 King Tiger Pleco / Maze Zebra Pleco (Hypancistrus seideli) is one of the most recognizable Rio Xingu plecos, famous for its intricate black or dark-brown maze-like lines over a white, cream, yellowish, or golden background.

Individual L333 can look dramatically different from one another. Their markings may form:

Broad tiger-like bands
Thin maze patterns
Wavy lines
Vermiculations
Loops
Broken stripes
Reticulated patterns

This extraordinary variation is now scientifically recognized as part of the natural diversity of:

Hypancistrus seideli

L333 was formally included in this newly described species in 2025, together with several other well-known Xingu L-number forms.

This listing is for:

L333 KING TIGER / MAZE ZEBRA PLECO BREEDING GROUP

🔎 Quick Facts – L333 King Tiger Pleco

📛 Common Name: King Tiger Pleco
📛 Other Names: Maze Zebra Pleco, Golden King Tiger Pleco
🔢 L-Number: L333
🔬 Scientific Name: Hypancistrus seideli
📅 Formally Described: 2025
🐟 Family: Loricariidae
🧬 Subfamily: Hypostominae
🧬 Genus: Hypancistrus
🐯 L333 Form: Stockier-bodied H. seideli phenotype
🐟 Listing Type: Breeding Group
📏 Current Group Size: Approximately 3–4.25 inches
🇧🇷 Country: Brazil
📍 State: Pará
🌊 Native River: Rio Xingu
🌎 River System: Amazon Basin
📍 Primary Species Range: Lower Rio Xingu
💧 Water Type: Freshwater
🪨 Natural Habitat: Rocky river habitat, cracks, crevices and submerged shelters
📏 Scientific Maximum: Approximately 150.2 mm / 5.9 inches total length
📏 Adult Planning Size: Approximately 5–6 inches
🏠 Breeding Group Aquarium: Approximately 40–55+ gallons
👥 Larger Groups: 55–75+ gallons preferred
🌡️ Temperature: Approximately 79–86°F
💧 pH: Approximately 5.5–7.5
💦 Water: Soft to moderately mineralized
💨 Oxygenation: High
🌊 Water Movement: Moderate; stronger circulation can be provided
🍽️ Diet: Protein-Leaning Omnivore
🦐 Animal / Insect Foods: Important
🌿 Plant Foods: Supplemental
🚫 Algae Cleaner: No
🪵 Wood Eater: No
😌 Temperament: Generally peaceful
⚠️ Pleco Temperament: Territorial around caves
🌙 Activity: Primarily crepuscular / nocturnal
🥚 Breeding: Cave Spawner
👨‍👧 Parental Care: Male guards eggs and developing fry
♂️ Adult Male Traits: Strong cheek, body and pectoral-fin odontodes
⭐ Care Level: Intermediate
🌎 Conservation: 2025 species description considers H. seideli consistent with Least Concern

🧬 Major 2025 Taxonomy Update

For decades L333 was known as:

Hypancistrus sp. L333

That changed in:

2025

when scientists formally described the species:

Hypancistrus seideli

The scientific description specifically includes the aquarium forms:

L066
L236
L287
L333
L399
L400

and potentially additional closely related Xingu morphotypes.

Therefore, the correct modern identification for this product is:

**L333 King Tiger Pleco – (Hypancistrus seideli)**

✍️ Scientific Name Formatting

The species name should be written:

Hypancistrus seideli

not:

Hypancistrus Seideli

Scientific species epithets are written with a:

LOWERCASE “s”

Therefore:

✅ Hypancistrus seideli

is correct.

👨‍🔬 Who Is seideli Named After?

The species was named in honor of:

INGO SEIDEL

a well-known German aquarist who has contributed extensively to:

Pleco husbandry
Loricariid identification
Hypancistrus breeding
Aquarium literature
Pleco education

The scientific authors specifically recognized his decades of work with these fishes.

🐯 L333 Is a Distinctive Phenotype of H. seideli

One of the most interesting discoveries from the modern taxonomic work is just how variable:

Hypancistrus seideli

can be.

The fish sold as L333 represents one recognizable phenotype within that species.

🆚 Typical L333 Body Shape

Compared with the traditional L066 phenotype, L333 generally has a:

STOCKIER BODY

with:

Deeper body profile
More compact appearance
Shorter-looking caudal region
Less deeply forked caudal fin

🆚 L333 vs. L066

Both are now:

Hypancistrus seideli

but hobbyists should continue preserving their L-number identities.

L333

Generally:

Stockier body
Higher body profile
Less deeply forked tail
Cream / yellow / golden coloration common
Strong maze-like markings

L066

Generally:

More slender body
Longer caudal-fin lobes
More deeply forked tail
Often whiter or gray-white
Longer worm-like markings

⚠️ Same Species Does Not Mean the L-Numbers Are Meaningless

Scientifically:

L333 AND L066 ARE THE SAME SPECIES

However, the L-numbers still describe recognizable aquarium:

Phenotypes
Geographic forms
Pattern lines

Therefore:

KEEP L333 IDENTIFIED AS L333

when breeding or selling these fish.

🧬 L236, L287, L399 & L400

Modern taxonomy also places:

L236
L287
L399
L400

within:

Hypancistrus seideli

This means several aquarium fish once believed to represent separate species are actually part of one exceptionally variable species.

⚠️ Breeding Different H. seideli Forms

Crossing:

L333 × L066
L333 × L236
L333 × L399
L333 × L400

would not technically be an:

INTERSPECIFIC HYBRID

because they are now considered the same species.

However, it would:

MIX DISTINCT AQUARIUM PHENOTYPE LINES

and make the offspring difficult to identify accurately.

For that reason:

KEEP L333 BREEDING LINES SEPARATE

when preservation of the L-number phenotype is the goal.

🌀 Maze-Like Pattern

L333 is famous for its:

MAZE PATTERN

The dark markings may form:

Curves
Loops
Wavy lines
Broken bars
Vermiculations
Reticulated networks

across the:

Head
Body
Dorsal fin
Pectoral fins
Pelvic fins
Caudal fin

🎨 Background Color

The pale background may range from:

White
Cream
Beige
Yellow
Golden
Pale pinkish cream

Scientific observations specifically document pale lines ranging from:

WHITE TO YELLOWISH

and occasionally even:

PINKISH

in living H. seideli.

⚫ Dark Pattern Color

Dark markings can appear:

Black
Charcoal
Dark brown
Gray-black

The resulting contrast can vary greatly between individual fish.

🔄 Pattern Changes With Age

Scientific work confirms that H. seideli changes pattern as it grows.

Juveniles

Generally show:

Thicker pale lines
Less wavy markings
Stronger banding
Occasional interrupted stripes

Larger Adults

May develop:

Thinner lines
More numerous lines
Greater vermiculation
Reticulated or honeycomb-like patterns

⚠️ Individual Variation Is Extreme

Even fish collected from the:

SAME POPULATION

can show substantially different patterns.

Therefore:

NO TWO L333 ARE GUARANTEED TO LOOK IDENTICAL

This is natural variation and not necessarily evidence of mixed genetics.

⚠️ Never Guarantee Adult Pattern

A juvenile with:

Bold black-and-white bands

may mature into a more:

Gray
Cream
Reticulated
Maze-patterned

adult.

Exact future:

Line width
Color
Pattern
Contrast

cannot be guaranteed.

🆚 L333 vs. L236 “Super White” Lines

Some selectively bred L236-type fish have been developed for extremely:

HIGH WHITE COVERAGE

Modern taxonomy places those fish within the same species:

Hypancistrus seideli

However, a selectively developed Super White breeding line should still be labeled according to its:

L-number history
Breeder line
Parentage

rather than simply being mixed into ordinary L333 colonies.

🌎 Native Distribution

Hypancistrus seideli is native to:

BRAZIL

within the:

RIO XINGU

in Pará.

🌊 Lower Rio Xingu

The 2025 scientific description documents the species throughout the:

LOWER XINGU CHANNEL

from the downstream end of:

VOLTA GRANDE DO XINGU

to the:

CONFLUENCE WITH THE AMAZON RIVER

📍 Broad Distribution for a Xingu Hypancistrus

This range is much broader than that of:

L046 ZEBRA PLECO – Hypancistrus zebra

which has a much more restricted distribution around the Volta Grande.

This difference has major conservation implications.

🪨 Natural Habitat

The natural habitat of H. seideli is more varied than older aquarium descriptions sometimes suggest.

Scientific observations document fish among:

Granitoid rocks
Sedimentary rock formations
Cracks
Crevices
Submerged shelters

📏 Depth Range

Hypancistrus seideli has been documented from:

LESS THAN 1 METER

to approximately:

40 METERS / 130 FEET DEEP

and ornamental fishermen report fish from even deeper locations.

This demonstrates an unusually broad ecological range.

🌊 Current Is Variable

L333 is frequently described as requiring:

EXTREME RAPIDS

throughout the aquarium.

That is too simplistic.

Wild H. seideli occurs in habitats with:

Stronger current
Moderate current
Slow-flowing areas

depending on locality.

Therefore, the aquarium does not need to resemble a permanent high-speed torrent.

💨 Oxygenation Is More Important Than Violent Current

For aquarium care:

HIGH DISSOLVED OXYGEN

is more important than forcing maximum current across every inch of the aquarium.

Provide:

Strong surface agitation
Good filtration
Air stones when useful
Powerheads
Canister-filter returns
Sump returns

🌊 Aquarium Water Movement

A good L333 aquarium can provide:

MODERATE WATER MOVEMENT

with some stronger-flow areas.

Also provide:

Caves
Rocks
Driftwood
Current breaks

where fish can rest.

🌡️ Temperature

L333 is a warm-water Xingu pleco.

A practical range is:

79–86°F / 26–30°C

Some breeding programs use temperatures around:

84–86°F

with very high oxygenation.

⚠️ Warm Water Requires Strong Oxygenation

As water temperature increases:

DISSOLVED OXYGEN DECREASES

Therefore, warmer L333 aquariums require:

Strong gas exchange
Surface movement
Reliable circulation

💧 Water Parameters

A practical long-term range is:

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

💧 Stable Water Is Important

Captive-bred or long-established L333 can tolerate a reasonable range of water chemistry.

Do not constantly adjust pH simply to chase one exact number.

Prioritize:

STABILITY + CLEAN WATER + HIGH OXYGEN

📏 Adult Size

The 2025 scientific description examined more than 100 Hypancistrus seideli specimens.

The largest documented total length was:

150.2 MM

or approximately:

5.9 INCHES TOTAL LENGTH

Therefore:

5–6 INCHES

is an appropriate adult planning size for L333.

🏠 Aquarium Size

For one adult or a compatible pair:

30–40 GALLONS

can provide adequate permanent housing when properly structured.

For the current:

BREEDING GROUP

I recommend approximately:

40–55+ GALLONS

with ample caves and bottom territory.

For larger colonies:

55–75+ GALLONS

provides additional flexibility.

📐 Aquarium Footprint Matters

Because L333 spends most of its time around:

Caves
Rocks
Substrate

aquarium:

LENGTH + WIDTH

matter more than excessive height.

A breeder-style footprint works extremely well.

🏠 Caves Are Essential

Every breeding setup should contain:

MORE CAVES THAN PLECOS

Suitable shelters include:

Ceramic pleco caves
Slate caves
Rock crevices
One-ended tubes

🪨 Rock Structure

Rockwork can provide:

Natural shelter
Territorial barriers
Additional caves
Shade
Current breaks

Make sure all rocks are securely positioned.

🪵 Driftwood

Driftwood can provide:

Shelter
Shade
Biofilm
Visual barriers
Natural structure

However:

L333 IS NOT A WOOD-EATING PLECO

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

🍽️ Diet – Protein-Leaning Omnivore

L333 is often described simply as:

CARNIVOROUS

That is somewhat too absolute.

A better practical description is:

PROTEIN-LEANING OMNIVORE

🦐 Animal & Insect Foods

L333 readily accepts foods such as:

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

🧪 L333 Larvae & Artemia

Aquaculture research on L333 demonstrated excellent acceptance of:

ARTEMIA NAUPLII

as a first external food for larvae.

Higher appropriate Artemia availability improved larval growth in the controlled study.

This reinforces the importance of:

HIGH-QUALITY ANIMAL PROTEIN

for growing L333.

🌿 Plant Foods

Some individuals will also consume:

Spirulina-containing foods
Vegetable-containing pleco pellets
Zucchini
Cucumber
Other appropriate vegetable matter

Juveniles may show more interest in plant-based foods than mature adults.

⚖️ Balanced Feeding

A good feeding program combines:

QUALITY ANIMAL / INSECT FOODS

with:

SOME PLANT-BASED / OMNIVORE FOODS

rather than feeding only one food type.

🚫 Not an Algae Cleaner

L333 should:

NOT BE PURCHASED FOR ALGAE CONTROL

It may occasionally graze:

Biofilm
Organic growth
Small amounts of algae

but it is not an efficient glass-cleaning pleco.

Intentional feeding is required.

🚫 Do Not Feed Only Algae Wafers

A diet consisting almost entirely of:

Algae wafers
Zucchini
Cucumber

does not reflect the feeding preference of L333.

Provide substantial protein-rich food.

⚠️ Avoid Excessive Protein Waste

Protein-rich foods can quickly increase:

Organic waste
Ammonia
Bacterial load

Do not overfeed.

Remove uneaten frozen or fresh food.

🌙 Behavior

L333 is primarily:

CREPUSCULAR / NOCTURNAL

Activity usually increases:

At dusk
During feeding
After lights dim
At night

☀️ Breeding Groups Can Become Quite Visible

Established fish may learn to:

Feed during daylight
Rest near cave entrances
Explore before lights out

Providing abundant caves often makes the fish:

MORE CONFIDENT

rather than less visible.

😌 Temperament

Toward midwater fish, L333 is generally:

PEACEFUL

Potential tankmates include appropriately selected:

Tetras
Pencilfish
Small characins
Peaceful cichlids
Other warm-water community fish

⚠️ Territorial Around Caves

The main territorial behavior occurs between plecos.

Mature males may defend:

Breeding caves
Preferred shelters
Feeding areas

👥 Breeding Group Housing

A breeding group should have:

Numerous caves
Visual barriers
Multiple feeding locations
Adequate floor space

Do not place one cave per fish and assume that is enough.

Provide:

MORE CAVES THAN FISH

so each pleco can choose among several options.

⚠️ “Breeding Group” Does Not Automatically Mean “Proven”

This product is sold as a:

BREEDING GROUP

meaning the fish are selected and maintained with reproduction in mind.

Unless the listing specifically states otherwise:

DO NOT AUTOMATICALLY DESCRIBE THE GROUP AS PROVEN BREEDERS

A group may contain:

Mature fish
Maturing fish
Sexually differentiated fish

without having previously produced fry together.

♂️ Male vs. Female

The 2025 scientific description confirms clear sexual dimorphism in mature Hypancistrus seideli.

Mature Males

Develop:

Larger head
Broader head
Hypertrophied cheek odontodes
Strong pectoral-spine odontodes
Odontodes over body plates
Slimmer body profile

Males also tend to:

GROW LARGER

than females.

Mature Females

Generally develop:

Rounder body profile
Fuller abdomen
Less extensive odontodes

Gravid females can become especially broad when viewed:

FROM ABOVE

⚠️ Sexing Smaller Fish

Sexual differences become more obvious with maturity.

A fish should not be guaranteed male or female based simply on:

Color
Stripe width
Body darkness

unless the sexual characteristics are clearly developed.

🥚 Captive Breeding – Well Established

L333 has been:

SUCCESSFULLY BRED EXTENSIVELY IN CAPTIVITY

It is one of the better-established Hypancistrus breeding projects in the aquarium hobby.

🏠 Cave Spawner

L333 is a:

CAVE-SPAWNING PLECO

The mature male establishes and guards a suitable cave.

🏠 Breeding Cave Design

Successful breeding caves are generally:

Closed at one end
Slightly wider than the male
Long enough for both fish during spawning
Positioned where clean oxygen-rich water reaches the entrance

Several sizes should be offered.

💕 Courtship

Typical spawning behavior includes:

The male establishes a cave.
A receptive female approaches.
The female enters.
The male may temporarily block the entrance.
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 larvae

🥚 Reproductive Research

Scientific research on L333 found mature females producing approximately:

35–54 DEVELOPING OOCYTES

in the largest reproductive batch examined.

This provides valuable biological information, but it should:

NOT

be presented as a guaranteed aquarium clutch size.

Actual captive spawns may vary considerably.

🐣 Fry

After the eggs hatch, the fry initially rely on their:

YOLK SACS

before active feeding begins.

Once feeding:

Newly hatched Artemia
Fine sinking protein foods
Fine omnivore foods
Appropriate fry pellets

can be offered.

💨 Fry Need Excellent Oxygenation

Crowded fry tanks can quickly develop:

Increased ammonia
Reduced oxygen
Slower growth

Scientific larviculture research found poorer performance at excessive stocking density.

Therefore:

DO NOT OVERCROWD L333 FRY

💧 Water Changes & Breeding

Breeding can sometimes be encouraged through:

Large water changes
Slight temperature changes
Strong conditioning
Increased oxygenation
High-quality food

These may simulate seasonal changes.

However:

NO SINGLE TRIGGER GUARANTEES SPAWNING

🧬 L333 Line Preservation

Because L333 is now known to belong to a highly variable species, maintaining good breeding records is more important than ever.

Preserve:

L333 designation
Parentage
Supplier information
Breeder-line information
Locality if known

⚠️ Do Not Mix L333 With Other Hypancistrus Species

L333 can potentially hybridize with other species of:

Hypancistrus

Therefore, breeding colonies should not be mixed with unrelated species such as:

L046 Hypancistrus zebra
L199 Hypancistrus furunculus
L201-type Orinoco Hypancistrus
L260 Queen Arabesque

⚠️ L333 × L066 Is Different From True Interspecific Hybridization

Because L333 and L066 are now:

THE SAME SPECIES

their offspring would not technically be interspecific hybrids.

However:

THEY WOULD BE MIXED L-NUMBER / PHENOTYPE LINEAGE FISH

and should not later be sold as:

Pure L333
Pure L066

without accurate lineage disclosure.

🌎 Conservation Status

The 2025 scientific description found Hypancistrus seideli to be:

WIDESPREAD THROUGHOUT THE LOWER RIO XINGU

from the downstream end of the Volta Grande to the Amazon confluence.

The researchers found:

NO IDENTIFIED IMMINENT THREATS

to the species and concluded its condition aligns with:

LEAST CONCERN

under IUCN criteria.

⚠️ Important Conservation Distinction

This should not be confused with:

L046 Hypancistrus zebra

or:

Hypancistrus yudja

Both have much more restricted distributions and greater conservation concerns.

L333 / H. seideli has a substantially broader natural range.

🚨 Aquarium Release Has Already Happened

The 2025 scientific description documents an:

**INTRODUCED H. seideli POPULATION NEAR ALTAMIRA**

believed to have originated after aquarium fish traders released captive fish.

This provides a very real example of why aquarium fish should:

NEVER BE RELEASED

even within a river basin where related populations already occur.

Releasing different geographic or aquarium forms can:

Alter local genetics
Mix natural populations
Spread disease
Change ecological relationships

⭐ Why Keep an L333 King Tiger Pleco?

The L333 combines:

🐯 Beautiful King Tiger pattern
🌀 Maze-like markings
🖤🤍 High-contrast coloration
🟡 Cream and golden forms
🇧🇷 Rio Xingu origin
📏 Manageable approximately 5–6 inch adult size
🦐 Protein-leaning omnivorous diet
😌 Generally peaceful behavior
🏠 Fascinating cave territoriality
🥚 Reliable captive breeding
👨‍👧 Male parental care
🧬 Newly resolved 2025 taxonomy

into one of the most interesting and established Hypancistrus breeding fish available.

⚠️ Important Considerations

Before purchasing an L333 King Tiger Pleco / Maze Zebra Pleco breeding group:

The correct scientific name is Hypancistrus seideli.
The species was formally described in 2025.
The species name seideli should use a lowercase “s.”
L333 is no longer scientifically undescribed.
L333, L066, L236, L287, L399 and L400 are now included within H. seideli.
L333 generally represents the stockier-bodied phenotype.
L066 generally represents a more slender phenotype with elongated caudal lobes.
Continue preserving L333 as a distinct aquarium breeding line.
Mixing L333 and L066 does not create an interspecific hybrid, but it does mix L-number phenotype lines.
This listing is for a breeding group.
The current group is approximately 3–4.25 inches.
“Breeding group” should not automatically be interpreted as “proven breeders” unless specifically stated.
The species originates from the Rio Xingu in Pará, Brazil.
Its scientific range covers much of the lower Xingu.
Natural habitat varies considerably in depth and water movement.
Do not claim L333 requires extreme current everywhere.
High dissolved oxygen is very important.
Maintain approximately 79–86°F.
Maintain approximately pH 5.5–7.5.
Keep ammonia and nitrite at zero.
Keep nitrate low.
Scientific specimens reach approximately 150.2 mm / 5.9 inches total length.
Plan for approximately 5–6 inches as an adult.
Provide approximately 40–55+ gallons for a breeding group.
Provide more caves than fish.
L333 is a protein-leaning omnivore.
Feed substantial aquatic animal and insect foods.
Provide some plant-based foods for variety.
Do not purchase L333 as an algae cleaner.
L333 is not a specialized wood eater.
Mature males develop extensive odontodes.
L333 is a confirmed cave spawner.
Males guard the eggs and developing fry.
Captive breeding is well established.
Preserve L333 breeding records and lineage.
Keep breeding colonies separate from unrelated Hypancistrus species.
The 2025 species description considers H. seideli consistent with Least Concern.
Never release aquarium fish into natural waterways.

🧬 Taxonomy

The currently accepted scientific name is:

Hypancistrus seideli Sousa, Sousa, Oliveira, Sabaj Pérez, Zuanon & Rapp Py-Daniel, 2025

Classification:

Order: Siluriformes
Family: Loricariidae
Subfamily: Hypostominae
Genus: Hypancistrus
Species: seideli
L-Number: L333
Other H. seideli Aquarium Forms: L066, L236, L287, L399, L400

Native range:

LOWER RIO XINGU – PARÁ, BRAZIL

For this product, use:

**L333 King Tiger Pleco / Maze Zebra Pleco – (Hypancistrus seideli)**

🔢 L333 Lineage Disclaimer

The 2025 scientific description places several familiar Xingu L-number forms within the same species:

Hypancistrus seideli

However, these forms still represent recognizable aquarium phenotypes.

To preserve the L333 line:

Breed documented L333 with L333
Preserve parent records
Preserve breeder/source information
Preserve locality information when known
Do not mix L333 with other H. seideli forms and later represent the offspring as pure L333

🚚 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 Hypancistrus seideli L333 may legally be purchased, possessed, transported, and received in their state or local jurisdiction before ordering.

Never release aquarium fish into natural waterways.