L173 Wavy Zebra Pleco - (Hypancistrus sp.)

Fish Details, Description and Information Below:

🦓 L173 Wavy Zebra Pleco – (Hypancistrus sp. L173) – Rio Xingu Zebra-Type Pleco

The L173 Wavy Zebra Pleco (Hypancistrus sp. L173) is a striking Brazilian pleco known for its dramatic black-and-white pattern of irregular, wavy, broken, and highly variable bands.

At first glance, L173 can resemble the famous L046 Zebra Pleco (Hypancistrus zebra), but typical L173 develop a much less orderly pattern. Instead of the cleaner, straighter zebra bands usually associated with L046, L173 may display:

Wavy black lines
Broken bands
Irregular loops
Partial spots
Maze-like markings
Highly variable fin patterns

L173 originates from the:

RIO XINGU IN PARÁ, BRAZIL

particularly the region associated with:

ALTAMIRA

The exact scientific identity of L173 remains unresolved. It should therefore continue to be identified as:

Hypancistrus sp. L173

and should not automatically be renamed Hypancistrus zebra, Hypancistrus seideli, or any other described species.

🔎 Quick Facts – L173 Wavy Zebra Pleco

📛 Common Name: Wavy Zebra Pleco
📛 Other Name: False Zebra Pleco
🔢 L-Number: L173
🔬 Scientific Identification: Hypancistrus sp. L173
🧬 Taxonomic Status: Scientifically unresolved / undescribed
🐟 Family: Loricariidae
🧬 Subfamily: Hypostominae
🇧🇷 Country: Brazil
📍 State: Pará
🌊 Native River: Rio Xingu
📍 Primary Aquarium Locality: Altamira / Rio Xingu region
💧 Water Type: Freshwater
📏 Typical Adult Size: Approximately 4.5–5 inches
📏 Large-Line Potential: Some aquarium lines may approach approximately 6 inches
🏠 Recommended Aquarium: Approximately 40 gallons or larger
👥 Groups / Breeding Colonies: 55+ gallons preferred
🌡️ Temperature: Approximately 79–86°F
💧 pH: Approximately 5.0–7.0
💦 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
🪵 Wood Eater: No
😌 Temperament: Generally peaceful
⚠️ Pleco Temperament: Mature males may defend caves
🌙 Activity: Primarily crepuscular / nocturnal
🥚 Breeding: Cave Spawner
👨‍👧 Parental Care: Male guards eggs and developing fry
🧬 Hybridization Risk: Yes – keep breeding lines separate from other Hypancistrus
⭐ Care Level: Intermediate
🌎 IUCN Status: Not Evaluated as an unresolved L-number form

🧬 L173 Remains Scientifically Unresolved

The safest identification remains:

Hypancistrus sp. L173

The abbreviation:

sp.

means the fish belongs to the genus Hypancistrus, but a scientifically accepted species identity has not been established.

L173 has been discussed in aquarium literature for decades, but considerable uncertainty remains over exactly what constitutes:

TRUE L173

⚠️ Do Not Assign a Species Name

I would not list L173 as:

Hypancistrus zebra
Hypancistrus seideli
Hypancistrus cf. zebra
Any other formally described Hypancistrus

unless future scientific work resolves its identity.

For now:

**L173 = Hypancistrus sp. L173**

is the safest product identification.

🦓 L173 vs. L046 Zebra Pleco

L173 has historically been compared closely with:

L046 Zebra Pleco – Hypancistrus zebra

Some aquarium literature has even suggested that certain L173 may represent unusual pattern variants of H. zebra.

Other specialists have treated L173 as a separate unidentified Hypancistrus.

Because that question remains unresolved:

DO NOT MARKET L173 AS L046

Typical L173

Often shows:

More irregular black markings
Wavy lines
Broken bands
More variable pattern
Longer-looking caudal fin
Strongly curved or sickle-shaped tail profile
Vertical-type patterning through portions of the tail

Typical L046

Usually shows:

More organized black-and-white zebra bands
Cleaner stripe pattern
Different caudal-fin pattern
Smaller overall adult size

Individual variation means pattern alone should never be considered absolute proof of identity.

🚨 L173 Is NOT Automatically L173b

This is especially important for the current product page.

The aquarium designation:

L173b

is:

NOT AN OFFICIAL L-NUMBER

It was a commercial designation associated with Aquarium Glaser and captive-bred fish being sold as a different grade or form of L173.

Therefore:

L173b SHOULD NOT BE LISTED AS A NORMAL SYNONYM FOR L173

🧬 What Is L173b?

L173b has historically been associated with captive fish that generally displayed:

Darker coloration
Less classic zebra appearance
Different stripe arrangements
Less white coloration

However, specialist sources have raised significant concerns over exactly which fish originally received the L173b designation and whether all modern fish sold under that name descend from the same lineage.

Therefore:

L173b SHOULD BE TREATED AS A SEPARATE TRADE / BREEDER-LINE DESIGNATION

rather than another name for L173.

⚠️ If Your Fish Are L173b

If supplier or breeder records specifically identify a shipment as:

L173b

then I recommend listing those fish as:

**L173b – Hypancistrus sp.**

rather than selling them under the normal L173 product page.

That keeps the customer's lineage information intact.

🧬 Lineage Matters More Than Appearance

The L173 aquarium trade has a long history of:

Misidentification
Uncertain breeder lines
Similar-looking Hypancistrus
Possible mixed ancestry
Fish being upgraded to L173 because of attractive patterns

A beautiful black-and-white Hypancistrus is:

NOT AUTOMATICALLY L173

⚠️ Similar Xingu Hypancistrus

Other Xingu fish that can sometimes resemble attractive L173 include forms historically associated with:

L066
L236
L333
L399
L400

Several of those forms are now included within the formally described:

Hypancistrus seideli

That does not mean L173 should automatically be placed into H. seideli.

L173 remains unresolved.

🎨 Appearance

The classic L173 appearance consists of a:

White
Cream
Pale ivory

background crossed by:

Black bands
Charcoal bands
Dark brown-black lines

🌊 Wavy Pattern

The feature responsible for the:

WAVY ZEBRA

name is its irregular banding.

Unlike perfectly straight zebra stripes, the lines may:

Bend
Curve
Split
Join
Break apart
Form loops
Form isolated spots

🔄 Extreme Individual Variation

One of the defining characteristics of L173 aquarium lines is:

PATTERN VARIABILITY

Even siblings from the same breeding group can develop dramatically different markings.

One fish may look strongly zebra-like while another develops:

Broken stripes
Spots
Dark patches
Maze patterns

⚠️ Juvenile Pattern Can Change

Young L173 may look substantially different after reaching adulthood.

As they mature:

Bands may widen
Bands may break apart
Spots may develop
White areas may shrink
Dark areas may expand
Tail markings may change

Therefore:

DO NOT GUARANTEE AN EXACT ADULT PATTERN

based on juvenile appearance.

⚪ Amount of White Varies

Some exceptional L173 may have:

MORE THAN HALF OF THE BODY APPEARING WHITE

while others may be significantly darker.

High-white appearance should not by itself be considered proof that a fish is a genetically pure or “better” L173.

⚠️ Pattern Grade Is Not Scientific Identity

Terms such as:

A Grade
B Grade
High White
Super White
Premium
L173b

are aquarium-trade or breeder descriptions.

They are:

NOT FORMAL SCIENTIFIC TAXONOMIC RANKS

🌎 Native Distribution

The original L173 aquarium fish are associated with:

RIO XINGU

in:

PARÁ, BRAZIL

📍 Altamira

Specialist L-number records associate L173 particularly with fish imported through or collected around:

ALTAMIRA

on the Rio Xingu.

For the product page, use:

RIO XINGU – PARÁ, BRAZIL

rather than simply:

South America

🌊 Rio Xingu

The Rio Xingu is a major clearwater tributary of the:

AMAZON RIVER

and is famous for its extraordinary diversity of loricariid catfish.

Its habitats can include:

Large rock formations
Boulders
Cracks
Crevices
Strongly oxygenated channels
Variable current

🪨 Aquarium Habitat

A proper L173 aquarium should contain substantial:

Rockwork
Slate
Ceramic caves
Pleco tubes
Crevices
Sheltered areas

Driftwood can also be used for:

Shade
Shelter
Territory boundaries
Natural appearance

🏠 Caves Are Essential

L173 uses caves for:

Daytime shelter
Security
Territory
Reproduction

When keeping multiple fish:

PROVIDE MORE CAVES THAN PLECOS

📐 Cave Selection

Suitable caves include:

Ceramic pleco caves
Clay tubes
Slate caves
Rock crevices
One-ended breeding tubes

Provide several:

Sizes
Shapes
Orientations

so mature males can choose appropriate territories.

📏 Adult Size

Established specialist references generally place L173 around:

12 CM / APPROXIMATELY 4.7 INCHES

Therefore:

APPROXIMATELY 4.5–5 INCHES

is a reasonable typical adult planning size.

📏 Some Lines May Grow Larger

Because numerous aquarium lines have circulated under the L173 designation, specialist breeders have also reported fish around:

15 CM / APPROXIMATELY 6 INCHES

For this reason, customers should understand that some L173-type lines may become somewhat larger than the typical 12 cm fish.

🏠 Aquarium Size

For one adult or a compatible pair:

40 GALLONS OR LARGER

provides a comfortable permanent setup.

For a group or breeding colony:

55 GALLONS OR LARGER

is preferred.

Experienced breeders may use smaller specialized breeding aquariums, but retail recommendations should provide customers with adequate:

Water volume
Bottom area
Filtration
Territory

📐 Bottom Area Is Important

L173 spends most of its life around:

Caves
Rocks
Substrate

so prioritize:

LENGTH + WIDTH

rather than excessive aquarium height.

🌡️ Temperature

L173 is a:

WARM-WATER XINGU PLECO

A practical long-term range is:

79–86°F / 26–30°C

I would avoid maintaining them permanently below approximately:

79°F / 26°C

💨 Warm Water Requires High Oxygen

Warm water naturally holds less dissolved oxygen.

Therefore:

HIGH OXYGENATION IS ESSENTIAL

Use:

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

🌊 Water Movement

Provide:

MODERATE TO STRONG WATER MOVEMENT

with protected resting areas behind:

Rocks
Caves
Driftwood

The entire aquarium does not need extreme current.

The important goals are:

CLEAN WATER + HIGH OXYGEN + GOOD CIRCULATION

💧 Water Parameters

A practical long-term range is:

🌡️ Temperature: Approximately 79–86°F
💧 pH: Approximately 5.0–7.0
💦 Hardness: Soft to moderately mineralized
💨 Oxygenation: High
🌊 Water Movement: Moderate to Strong
☠️ Ammonia: 0 ppm
☠️ Nitrite: 0 ppm
🔄 Nitrate: Keep low

⚠️ Clean Water Is Very Important

Specialist L173 keepers report that these fish can react poorly to:

HIGH BACTERIAL LOADS AND DETERIORATING WATER QUALITY

Maintain:

Strong filtration
Regular water changes
Low organic waste
High oxygen

💩 Filtration

Suitable filtration may include:

Canister filters
Sumps
Sponge filters
Supplemental powerheads
Strong biological filtration

The goal should be:

WARM, CLEAN, HIGHLY OXYGENATED WATER

🍽️ Diet – Protein-Leaning Omnivore

L173 should not be treated as a typical algae-eating pleco.

The best aquarium description is:

PROTEIN-LEANING OMNIVORE

Adult Hypancistrus generally show considerably more interest in:

Invertebrates
Aquatic animal foods
Insect foods
High-quality prepared foods

than in aquarium algae.

🦐 Recommended Foods

Suitable foods include:

Mysis shrimp
Brine shrimp
Bloodworms
Black mosquito larvae
White mosquito larvae
Krill
Cyclops
Chopped shrimp
Mussel
Insect-based sinking foods
Quality omnivore tablets
Quality protein-rich pleco pellets

🌿 Plant Foods

Juveniles may consume more plant matter than mature adults.

Supplemental foods can include:

Spirulina-containing foods
Vegetable-containing sinking tablets
Zucchini
Other appropriate vegetables

However:

PLANT MATERIAL SHOULD NOT BE THE FOUNDATION OF THE ADULT DIET

🚫 Not an Algae Cleaner

L173 should:

NOT BE PURCHASED FOR ALGAE CONTROL

It is not comparable to specialized grazing plecos.

Aquarium algae is not a complete diet.

🪵 Not a Wood-Eating Pleco

L173 is also:

NOT A SPECIALIZED WOOD EATER

Driftwood can provide:

Shelter
Shade
Biofilm
Territory

but is not required as a primary food source and should never be described as necessary for digestion.

🌙 Activity

L173 is primarily:

CREPUSCULAR / NOCTURNAL

and may spend much of the daylight period inside:

Caves
Rock cracks
Shelters

☀️ Established Fish May Become More Visible

Once acclimated, L173 may:

Leave caves during daytime
Feed before lights out
Rest openly near shelters

Keeping them with calm midwater fish can sometimes make shy plecos feel more secure.

😌 Temperament

L173 is generally:

PEACEFUL

toward most appropriately chosen midwater fish.

Potential tankmates include compatible:

Tetras
Pencilfish
Small characins
Peaceful cichlids
Other calm warm-water species

⚠️ Territorial Around Caves

Adult males can become territorial around:

Breeding caves
Preferred shelters
Feeding areas

This usually involves:

Pushing
Chasing
Cave blocking

rather than active predation.

👥 Group Housing

L173 can be maintained in groups when adequate space is available.

Provide:

More caves than fish
Multiple feeding locations
Visual barriers
Adequate bottom area

🚨 Avoid Mixing Different Hypancistrus

Different Hypancistrus may:

HYBRIDIZE IN CAPTIVITY

This is especially problematic with L173 because its identification is already difficult.

For breeding projects:

KEEP L173 SEPARATE FROM OTHER HYPANCISTRUS

🚫 Do Not Breed L173 With:

L046
L066
L201
L236
L260
L333
L399
L400
L411
Other unidentified Hypancistrus

🧬 Protect the Lineage

If breeding L173:

Preserve breeder information
Record parent fish
Preserve collection lineage when known
Do not add unrelated Hypancistrus
Label uncertain fish honestly

⚠️ Hybrid Offspring

If an accidental cross occurs:

THE OFFSPRING MUST BE LABELED AS HYBRIDS

They should never be returned to the hobby as:

PURE L173

Misidentified breeding stock is one of the reasons L173 identification is already so complicated.

♂️ Male vs. Female

Sexing becomes easier with mature fish.

Mature Males

Typically develop:

Broader head
Longer head profile
Stronger cheek odontodes
Stronger odontodes on the pectoral-fin spines
More extensive odontodes toward the rear body

Mature Females

Generally:

Have less extensive odontodes
Develop fuller abdominal profiles
Look broader through the abdomen when carrying eggs

⚠️ Juveniles Are Difficult to Sex

Small L173 should normally be:

SOLD AS UNSEXED

unless sex can be confidently determined.

🥚 Captive Breeding – Documented

L173 has been:

SUCCESSFULLY BRED IN CAPTIVITY

It is a:

CAVE-SPAWNING PLECO

🏠 Breeding Caves

One-ended:

CLAY OR CERAMIC PLECO CAVES

have proven effective.

The cave should generally be:

Slightly wider than the male
Long enough for both fish during spawning
Closed at one end
Positioned in clean, oxygenated water

💕 Spawning Behavior

Typical spawning behavior includes:

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

👨‍👧 Male Parental Care

The male:

GUARDS AND FANS THE EGGS

and remains responsible for the brood during development.

He helps:

Protect the clutch
Keep water moving over the eggs
Guard the cave

🥚 Clutch Size Varies Considerably

One interesting feature of aquarium L173 lines is that reported clutch sizes vary significantly.

Some smaller lines may produce approximately:

10–15 EGGS

while larger lines have reportedly produced:

30–45 EGGS

This wide variation may partly reflect the diversity of fish circulating under the L173 name.

Therefore:

DO NOT PROMISE A SPECIFIC CLUTCH SIZE

🌡️ Breeding Temperature

Specialist breeders often obtain better spawning activity around:

82–86°F / 28–30°C

with:

High oxygenation
Clean water
Strong conditioning
Appropriate caves

🌧️ Possible Spawning Triggers

Aquarists have reported spawning following:

Large water changes
Increased current
Heavy conditioning with frozen/live foods
Warm temperatures

These may simulate seasonal environmental changes.

However:

NO SINGLE METHOD GUARANTEES SPAWNING

👶 Raising Fry

Once yolk sacs are absorbed, fry can receive:

Fine baby brine shrimp
Fine insect foods
Crushed sinking tablets
Cyclops
Fine protein-rich pleco foods

Feed frequently while maintaining:

EXCELLENT WATER QUALITY

⚠️ Young Hypancistrus Require Care

Very small juveniles can be more sensitive to:

Sudden water changes
Poor oxygenation
Accumulated food
Bacterial buildup

Stable, clean water is especially important during the early growth period.

🆚 L173 vs. L173b – Final Rule

For your store:

If the fish is documented as L173:

Use:

**L173 Wavy Zebra Pleco – (Hypancistrus sp. L173)**

If the breeder or supplier specifically identifies the fish as L173b:

Use:

**L173b Hypancistrus sp. – Captive Line**

and explain that L173b is a trade/breeder designation rather than an official L-number.

DO NOT USE L173 AND L173b INTERCHANGEABLY.

⚠️ Important Considerations

Before purchasing an L173 Wavy Zebra Pleco:

Keep the scientific identification as Hypancistrus sp. L173.
L173 remains scientifically unresolved.
Do not automatically identify it as Hypancistrus zebra.
Do not automatically identify it as Hypancistrus seideli.
Do not invent a scientific species name.
L173 originates from the Rio Xingu in Pará, Brazil.
Altamira is strongly associated with the aquarium L173 locality.
L173 has highly variable black-and-white patterning.
Adult pattern may differ substantially from juvenile pattern.
Exact adult markings cannot be guaranteed.
L173b is not an official L-number.
Do not list L173b as a normal synonym for L173.
Preserve breeder and supplier lineage information.
Attractive L066/L333-type fish should not automatically be marketed as L173.
Typical adults reach approximately 12 cm / 4.7 inches.
Plan for approximately 4.5–5 inches, with some lines potentially larger.
Provide approximately 40 gallons or larger.
Use 55+ gallons for groups or breeding colonies.
Provide more caves than fish.
Maintain approximately 79–86°F.
Maintain high dissolved oxygen.
Provide moderate to strong circulation.
Keep ammonia and nitrite at zero.
Keep nitrate low.
Feed a protein-leaning omnivorous diet.
Provide regular animal and insect foods.
Plant foods are supplemental.
Do not purchase L173 as an algae cleaner.
L173 is not a specialized wood eater.
Captive cave spawning is documented.
Males guard the eggs and developing fry.
Clutch sizes vary significantly among reported L173 lines.
Different Hypancistrus may hybridize.
Keep L173 breeding lines separate from other Hypancistrus.
Label any mixed offspring honestly as hybrids.
L173 has no separate formal IUCN assessment.
Never release aquarium fish into natural waterways.

🧬 Taxonomy

The safest current identification is:

Hypancistrus sp. L173

Classification:

Order: Siluriformes
Family: Loricariidae
Subfamily: Hypostominae
Genus: Hypancistrus
Species: Unresolved / Undescribed
L-Number: L173

Native aquarium locality:

RIO XINGU – PARÁ, BRAZIL

with:

ALTAMIRA

strongly associated with the original aquarium form.

For this product, use:

**L173 Wavy Zebra Pleco – (Hypancistrus sp. L173)**

🔢 L-Number & Lineage Disclaimer

L173 has one of the more complicated histories among aquarium Hypancistrus.

Fish sold as L173 over the years have included:

Several breeder strains
Highly variable offspring
Questionable identifications
L173b lines
Other attractive Xingu Hypancistrus
Potential mixed or uncertain lines

For that reason:

LINEAGE INFORMATION IS EXTREMELY IMPORTANT

Preserve:

L173 designation
Supplier information
Breeder information
Collection locality when known
Parentage

L173b should remain separately identified when that is the documented breeder line.

🌎 Conservation Status

Because L173 remains scientifically unresolved and has no formal species identity:

IUCN STATUS: NOT EVALUATED

Do not automatically assign the conservation status of:

Hypancistrus zebra
Hypancistrus seideli
Any other Hypancistrus

to L173.

🚚 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 sp. L173 may legally be purchased, possessed, transported, and received in their state or local jurisdiction before ordering.

Never release aquarium fish into natural waterways.