🔥 L273 Titanicus Pleco – (Pseudacanthicus sp. L273) – Wild-Caught Rio Tapajós Cactus Pleco

The L273 Titanicus Pleco (Pseudacanthicus sp. L273), also commonly called the Titanic Pleco, Red Titanic Pleco, or Titanicus Cactus Pleco, is a spectacular large Brazilian pleco famous for its heavy armor, enormous fins, aggressive-looking odontodes, and highly variable black, olive, gold, yellow, orange, and reddish patterning.

Young and exceptionally colored specimens can show dramatic:

• Orange markings
• Golden coloration
• Yellow patches
• Red-orange fin coloration
• Black spots
• Reticulated patterns

while mature fish may develop a darker and more mottled appearance.

L273 originates from the:

RIO TAPAJÓS IN PARÁ, BRAZIL

and is a large, warm-water, highly oxygen-demanding member of the cactus pleco genus Pseudacanthicus.

Despite being known in the aquarium hobby for decades, L273 has not yet received a formally described scientific species name.

The correct identification remains:

Pseudacanthicus sp. L273

This listing is for:

WILD-CAUGHT L273 TITANICUS PLECOS

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🔎 Quick Facts – L273 Titanicus Pleco

• 📛 Common Name: Titanicus Pleco
• 📛 Other Names: Titanic Pleco, Red Titanic Pleco, Titanic Cactus Pleco
• 🔢 L-Number: L273
• 🔬 Scientific Identification: Pseudacanthicus sp. L273
• 🧬 Taxonomic Status: Scientifically Undescribed
• 🐟 Family: Loricariidae
• 🧬 Subfamily: Hypostominae
• 🌵 Group: Cactus Pleco
• 🌿 Stock: Wild Caught
• 📏 Current Size: Approximately 8 inches
• 🇧🇷 Country: Brazil
• 📍 State: Pará
• 🌊 Native River: Rio Tapajós
• 🌊 River System: Amazon Basin
• 💧 Water Type: Clearwater Freshwater
• 🪨 Habitat: Deep, rocky, highly oxygenated river habitat
• 📏 Typical Large Adult: Approximately 12–14 inches
• 📏 Adult Planning Size: Approximately 14–16 inches
• 📏 Large Specimens: Can exceed 40 cm / approximately 16 inches
• 🏠 Minimum Permanent Adult Aquarium: Approximately 125 gallons
• 🏠 Preferred Adult Aquarium: 180+ gallons
• 📐 Recommended Aquarium Length: Approximately 5–6 feet or longer
• 🌡️ Temperature: Approximately 79–86°F
• 💧 pH: Approximately 5.5–7.2
• 💦 Water: Soft to moderately mineralized
• 💨 Oxygenation: Very High
• 🌊 Water Movement: Moderate to Strong
• 🍽️ Diet: Carnivorous / Protein-Leaning
• 🦐 Animal & Invertebrate Foods: Primary
• 🌿 Plant Foods: Minor / Supplemental
• 🚫 Algae Cleaner: No
• 🪵 Wood Eater: No
• 😠 Temperament: Territorial
• ⚠️ Pleco Aggression: Can become aggressive toward other large bottom dwellers
• 🌙 Activity: Primarily nocturnal
• 🥚 Breeding: Confirmed Cave Spawner
• 👨‍👧 Parental Care: Male guards the clutch
• ⭐ Care Level: Intermediate to Advanced
• 🌎 IUCN Status: Not Evaluated as an undescribed L-number form
• 📦 Shipping: Reusable / heavy-duty shipping bag required for current large specimen

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🧬 L273 Is Still Scientifically Undescribed

The safest and most accurate identification remains:

Pseudacanthicus sp. L273

The abbreviation:

sp.

indicates that this fish clearly belongs to the genus:

Pseudacanthicus

but has not yet received a formally published species name.

Therefore:

DO NOT INVENT OR SUBSTITUTE A SPECIES NAME

For this product, use:

L273 Titanicus Pleco – (Pseudacanthicus sp. L273)

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🔢 Why the L273 Number Matters

Because the fish remains scientifically undescribed, the aquarium designation:

L273

is especially important.

It preserves the identity of this particular:

RIO TAPAJÓS PSEUDACANTHICUS

within the aquarium trade.

Always preserve:

• L273 designation
• Supplier information
• Collection locality when known
• Breeding records
• Parentage of captive-bred fish

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🌵 Cactus Pleco

Members of the genus:

Pseudacanthicus

are commonly called:

CACTUS PLECOS

because their bodies and fins develop extensive:

• Odontodes
• Spines
• Sharp bony projections

that give them an almost cactus-like armored appearance.

L273 is an especially impressive member of this group.

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⚠️ Heavily Armored Fish

A mature L273 has:

• Thick bony plates
• Strong pectoral spines
• Large dorsal spine
• Extensive odontodes
• Powerful body
• Large fins

Handling requires care.

The fish's odontodes and spines can:

PUNCTURE SKIN AND SNAG NETS

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🔥 Why Is It Called the Titanicus Pleco?

The aquarium name:

TITANICUS

reflects the fish's:

• Large adult size
• Heavy armor
• Powerful body
• Oversized fins
• Impressive coloration

It is also commonly called the:

TITANIC PLECO

in the international aquarium trade.

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🎨 Highly Variable Coloration

L273 is famous for being:

EXTREMELY VARIABLE

Different specimens can look dramatically different.

Base coloration may include:

• Olive
• Brown
• Gray
• Charcoal
• Nearly black
• Golden brown

with markings ranging through:

• Black
• Yellow
• Orange
• Gold
• Salmon
• Red-orange

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🔥 Exceptional Juveniles

Some juveniles are extraordinarily colorful.

High-quality specimens may display:

• Bright orange fins
• Golden body coloration
• Orange-red seams
• Strong black patterning
• Leopard-like spots
• Reticulated markings

These especially colorful fish are sometimes marketed as:

RED TITANIC L273

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⚠️ Color Changes With Age

One of the most important things customers should understand is:

L273 COLORATION CAN CHANGE DRAMATICALLY AS THE FISH GROWS

Young fish may have extremely distinct:

• Spots
• Lines
• Orange areas
• Yellow areas

that become:

• More mottled
• More irregular
• Darker
• Less sharply defined

with maturity.

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⚠️ Do Not Guarantee Adult Color

A beautifully colored juvenile does not guarantee that the fish will retain exactly the same:

• Orange intensity
• Spot pattern
• Yellow coloration
• Red coloration
• Contrast

through adulthood.

Pattern and coloration can change substantially with growth.

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✨ Metallic Sheen

Many L273 develop an unusual:

METALLIC OR IRIDESCENT SHEEN

particularly toward the rear of the body.

Depending on lighting, this can create:

• Bronze
• Gold
• Copper
• Greenish
• Metallic-gray

reflections.

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🐟 Large Fins

L273 develops extremely impressive:

• Dorsal fins
• Pectoral fins
• Caudal fins

Mature specimens may also develop elongated:

CAUDAL-FIN FILAMENTS

at the upper and lower tips of the tail.

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⚠️ Fin Filaments Can Be Damaged

Large fin extensions can be damaged by:

• Fighting
• Rough décor
• Poor handling
• Shipping
• Inadequate aquarium space

Provide:

• Smooth décor
• Large caves
• Sufficient bottom area

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🌎 Native Distribution

L273 originates from:

BRAZIL

in the state of:

PARÁ

within the:

RIO TAPAJÓS

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🌊 Rio Tapajós

The Tapajós is one of the major tributaries of the:

AMAZON RIVER

and is generally classified as a:

CLEARWATER RIVER

The system is known for:

• Clear water
• Rocky formations
• Rapids
• Large channels
• Strong current
• High dissolved oxygen

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📍 Aquarium Locality

Aquarium L-number records particularly associate L273 with portions of the Rio Tapajós around:

PIMENTAL – ITAITUBA

in Pará.

Collection locality should be preserved whenever available.

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🌊 Deep-Water Habitat

Specialist field information reports L273 being collected from water approaching approximately:

20 METERS / 65 FEET DEEP

in some areas.

This does not mean every L273 permanently lives at exactly that depth.

It demonstrates that this is a:

LARGE RIVER PLECO

adapted to substantial river habitat rather than shallow stagnant ponds.

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🪨 Natural Habitat

Natural L273 habitat includes:

• Large rocks
• Rocky crevices
• Deep cavities
• Boulders
• Submerged structure
• Flowing clear water

The aquarium should therefore provide substantial:

ROCK + CAVE STRUCTURE

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💨 Very High Oxygenation

One of the most important husbandry requirements is:

VERY HIGH DISSOLVED OXYGEN

The Rio Tapajós habitats associated with L273 contain:

• Clean water
• Moving water
• High oxygen levels

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🌡️ Warm Water Makes Oxygen More Important

L273 prefers warm water.

However:

WARMER WATER HOLDS LESS DISSOLVED OXYGEN

Therefore, high temperature must be accompanied by:

• Strong surface agitation
• High filtration turnover
• Air stones
• Powerheads
• Circulation pumps
• Sump returns

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🌡️ Temperature

Specialist L273 references generally use approximately:

79–86°F / 26–30°C

This is a better target than maintaining the species continuously at cooler tropical temperatures.

A good general maintenance range is:

80–84°F

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🌊 Water Movement

Provide:

MODERATE TO STRONG WATER MOVEMENT

L273 appreciates substantial circulation, but the aquarium should also contain:

• Caves
• Rock overhangs
• Driftwood
• Current breaks

where the fish can rest.

The goal is:

HIGH OXYGEN + HIGH WATER TURNOVER

rather than blasting the fish continuously.

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💧 Water Parameters

A practical long-term range is:

• 🌡️ Temperature: Approximately 79–86°F
• 💧 pH: Approximately 5.5–7.2
• 💦 Hardness: Soft to moderately mineralized
• 💨 Oxygenation: Very High
• 🌊 Water Movement: Moderate to Strong
• ☠️ Ammonia: 0 ppm
• ☠️ Nitrite: 0 ppm
• 🔄 Nitrate: Keep low

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⚠️ Water Quality Matters

Large wild L273 should not be maintained in:

• Dirty water
• Low oxygen
• Excessive nitrate
• Heavy organic waste
• Stagnant conditions

Regular water changes are essential.

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🔄 Water Changes

A strong maintenance program may include:

REGULAR LARGE PARTIAL WATER CHANGES

The exact frequency depends on:

• Aquarium size
• Fish size
• Feeding
• Stocking
• Filtration
• Nitrate production

A large protein-fed pleco can create substantial organic waste.

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💩 Strong Filtration Is Essential

Recommended filtration may include:

• Large canister filters
• Sump filtration
• Strong biological filtration
• High-capacity mechanical filtration
• Supplemental powerheads
• Prefilters

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📏 Adult Size – Important Update

Many older aquarium references list L273 around:

30 CM / APPROXIMATELY 12 INCHES

However, modern specialist L-number references document fish reaching:

35–40 CM

with some records exceeding:

40 CM TOTAL LENGTH

Therefore:

12 INCHES SHOULD NOT BE USED AS A HARD MAXIMUM

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📏 Responsible Adult Planning Size

For customer planning:

EXPECT APPROXIMATELY 14–16 INCHES

with some individuals potentially exceeding:

16 INCHES

under long-term conditions.

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⚠️ This Is a Large Pleco

L273 should be treated as:

A LARGE PERMANENT AQUARIUM FISH

not a medium-sized pleco.

It also has:

• Heavy armor
• Large fins
• Territorial behavior

which make floor space especially important.

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🏠 Aquarium Size

For one mature L273:

125 GALLONS SHOULD BE CONSIDERED THE PRACTICAL MINIMUM

I strongly prefer:

180+ GALLONS

for a large adult, especially when keeping:

• Other plecos
• Large catfish
• Large cichlids
• Multiple bottom-dwelling fish

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📐 Aquarium Length

Specialist references recommend aquariums at least approximately:

150 CM / 5 FEET LONG

For a fish that may reach 14–16+ inches:

6 FEET OR LONGER IS BETTER

whenever possible.

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📐 Width Is Extremely Important

Large plecos need room to:

• Turn
• Rest
• Extend their fins
• Defend territory
• Move around décor

Therefore:

FRONT-TO-BACK WIDTH MATTERS

A long, wide aquarium is much more useful than a narrow, tall aquarium with the same gallon volume.

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🪨 Aquarium Setup

A suitable L273 aquarium should contain:

• Large caves
• Smooth boulders
• Slate
• Large rock formations
• Heavy driftwood
• Sand or smooth gravel
• Open bottom areas
• Strong filtration
• Strong circulation
• Very high oxygenation

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🏠 Large Caves Are Essential

L273 requires shelters large enough to accommodate its:

• Heavy body
• Oversized fins
• Adult length

Suitable caves may be constructed from:

• Large ceramic pleco caves
• Slate
• Rock formations
• Heavy-duty tubes
• Large driftwood cavities

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⚠️ Secure the Décor

A mature L273 is extremely powerful.

Loose rocks and decorations can be:

• Shifted
• Pushed
• Knocked over

All heavy décor should be positioned so it cannot:

COLLAPSE ON THE FISH

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🪵 Driftwood

Driftwood is useful for:

• Shelter
• Shade
• Territory boundaries
• Natural structure

However:

L273 IS NOT A WOOD-EATING PLECO

It is not comparable to:

• Panaque
• Panaqolus

in feeding ecology.

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🚫 Do Not Claim L273 Needs Wood for Digestion

Wood may be included in the aquarium, but:

IT IS NOT A DIETARY REQUIREMENT

and should not be described as necessary for digestion.

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🍽️ Diet – Primarily Carnivorous

L273 is best described as:

CARNIVOROUS / STRONGLY PROTEIN-LEANING

It is not an algae-grazing pleco.

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🦐 Recommended Foods

Excellent foods include:

• Shrimp
• Prawns
• Mysis shrimp
• Krill
• Mussel
• Cockle
• Bloodworms
• Mosquito larvae
• Insect larvae
• Quality carnivore pellets
• Insect-based sinking foods
• High-quality omnivore tablets

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🦪 Mollusks

Foods such as:

• Mussel
• Cockle
• Clam meat

can be particularly useful for large cactus plecos.

Cut food into appropriately sized portions.

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🦐 Crustaceans

Suitable crustacean foods include:

• Shrimp
• Prawn
• Krill
• Mysis

These provide high-quality animal protein.

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🚫 Carnivore Does Not Mean Fish Predator

Although L273 is strongly carnivorous:

IT IS NOT PRIMARILY AN ACTIVE FISH-HUNTING PREDATOR

Its diet is better thought of as:

BENTHIC ANIMAL / INVERTEBRATE FEEDING

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⚠️ Avoid Feeder Fish

Live feeder fish are unnecessary.

They can introduce:

• Parasites
• Bacteria
• Disease
• Poor nutrition

High-quality frozen, prepared, and fresh aquatic foods are safer.

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🌿 Plant Foods

Some individuals may accept small amounts of:

• Vegetable-containing pellets
• Spirulina foods
• Zucchini
• Other vegetable matter

However:

PLANT FOODS SHOULD NOT FORM THE FOUNDATION OF THE DIET

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🚫 Not an Algae Cleaner

L273 is:

NOT AN ALGAE-CONTROL PLECO

Do not purchase this species to clean:

• Aquarium glass
• Rocks
• Decorations

It requires intentional protein-rich feeding.

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🌙 Nocturnal Behavior

L273 is primarily:

NOCTURNAL

and can be extremely secretive during the day.

It may spend daylight hours:

• Inside caves
• Behind rocks
• Beneath driftwood

Activity increases:

• At dusk
• During nighttime
• At feeding time

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☀️ Established Fish May Become More Visible

Once acclimated, some individuals learn to:

• Feed during the day
• Leave caves before lights out
• Rest openly

However, adequate shelter should always be available.

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🧪 Wild-Caught Acclimation

This listing is for:

WILD-CAUGHT L273 TITANICUS PLECOS

Wild fish deserve careful acclimation.

After arrival:

• Provide immediate shelter
• Keep lighting subdued
• Maintain very high oxygen
• Avoid abrupt temperature changes
• Avoid abrupt pH changes
• Maintain pristine water
• Confirm feeding

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🍽️ Confirm Feeding

A newly imported L273 may refuse food when:

• Stressed
• Exposed
• Outcompeted

Offer food:

• Near the cave
• At dusk
• After lights out
• In several locations

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⚠️ Watch Body Condition

Monitor for:

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

An 8-inch wild specimen requires substantial nutrition and should not be allowed to lose significant body condition.

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😠 Territorial Behavior

L273 can be:

STRONGLY TERRITORIAL

especially toward:

• Other L273
• Other Pseudacanthicus
• Large plecos
• Similar nocturnal bottom dwellers

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⚔️ Large Adults Can Fight

Territorial disputes may involve:

• Pushing
• Pinning
• Cave blocking
• Tail striking
• Pectoral-spine contact
• Odontode injuries

Because of their heavy armor and spines, fights can cause serious damage.

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👥 Multiple L273

Keeping several L273 is possible only when the aquarium provides:

• Large bottom area
• Multiple caves
• Multiple feeding locations
• Strong visual barriers
• Excellent filtration

Do not crowd mature adults.

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🐠 Midwater Tankmates

Toward appropriately sized midwater fish, L273 is usually less problematic.

Potential tankmates can include compatible:

• Large tetras
• Silver dollars
• Large South American cichlids
• Other robust tropical fish

provided they tolerate:

• Warm water
• Strong oxygenation

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⚠️ Bottom-Dwelling Tankmates Require More Caution

The greatest compatibility concern is with other:

LARGE BOTTOM-DWELLING FISH

because they compete for:

• Caves
• Food
• Territory

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🛡️ Handling L273

A large L273 should be handled with extreme care.

It possesses:

• Sharp odontodes
• Strong pectoral spines
• Large dorsal spine
• Heavy armor

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🚫 Ordinary Nets Can Be a Problem

The fish's spines can become:

BADLY ENTANGLED IN FINE NETTING

For larger specimens, safer transfer methods may include:

• Rigid containers
• Large tubs
• Heavy-duty fish bags
• Large coarse transfer nets when appropriate

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🩸 Sharp Odontodes

The odontodes covering a mature cactus pleco can:

SCRATCH OR PUNCTURE HUMAN SKIN

Avoid grabbing large adults with bare hands.

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♂️ Male vs. Female

Sex differences become clearer in mature fish.

Mature Males

Often develop:

• Wider head
• Stronger head profile
• More prominent odontodes
• Stronger pectoral-fin odontodes
• Larger dorsal fin
• More intense coloration in some individuals

Mature Females

Generally:

• Have a somewhat narrower head
• Develop a fuller abdomen when carrying eggs
• May show somewhat less extensive odontode development

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⚠️ Color Is Not a Guaranteed Sexing Tool

Although some males can be more colorful:

DO NOT SEX L273 BY COLOR ALONE

Juveniles and subadults are particularly difficult to sex confidently.

Unless confidently identified:

SELL AS UNSEXED

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🥚 Captive Breeding – Confirmed

Older aquarium literature often stated that breeding L273 was:

UNKNOWN

That information is now outdated.

L273 has been:

SUCCESSFULLY BRED IN CAPTIVITY

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🏠 Cave Spawner

L273 is a:

CAVE-SPAWNING PLECO

Mature adults require exceptionally large caves because of their:

• Adult body size
• Large fins
• Heavy armor

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💕 Documented Captive Breeding

One specialist breeding report involved approximately:

• Male: 30 cm
• Female: 20 cm

The adults were initially maintained separately because of their:

TERRITORIAL BEHAVIOR

After acclimating the pair together, a large spawning cave was introduced.

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🏠 Large Breeding Cave

The documented breeding cave was approximately:

10 CM WIDE × 40 CM LONG

demonstrating how much larger breeding structures need to be compared with caves used for:

• Hypancistrus
• Peckoltia
• Small Ancistrus

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💕 Spawning

The breeding pair reportedly remained inside the spawning cave for approximately:

THREE DAYS

before the female exited.

The male remained to:

GUARD THE CLUTCH

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👨‍👧 Male Parental Care

After spawning:

THE MALE GUARDS AND FANS THE EGGS

as is typical for many cave-spawning loricariids.

He protects:

• Eggs
• Developing embryos
• Newly hatched larvae

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🥚 Documented Fry

In one documented breeding attempt:

20 LARVAE WERE SUCCESSFULLY RAISED

after the clutch was removed for artificial incubation.

This demonstrates conclusively that:

L273 CAN BE CAPTIVE BRED

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⚠️ Breeding Is Still Difficult

Captive breeding remains:

RARE AND ADVANCED

because adult L273:

• Grow very large
• Mature slowly
• Require large breeding aquariums
• Can be aggressive toward one another
• Need huge caves
• Require excellent oxygenation

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⚠️ Pair Compatibility Matters

One of the greatest challenges is finding:

A COMPATIBLE PAIR

Introducing two large territorial cactus plecos without sufficient space can result in serious injury.

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🌧️ Possible Breeding Triggers

Specialist breeding observations suggest that spawning may sometimes be associated with:

• Large water changes
• Softer incoming water
• High temperatures
• Changes in atmospheric pressure
• Seasonal/weather changes

However:

NO SINGLE TRIGGER GUARANTEES SPAWNING

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👶 Fry Can Be Challenging

Young L273 require:

• Very clean water
• High dissolved oxygen
• Frequent feeding
• Strong growth nutrition
• Careful stocking density

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⚠️ Juvenile Aggression

Specialist breeders have reported that young L273 may:

DAMAGE ONE ANOTHER

when overcrowded.

For intensive breeding projects, separating young fish into smaller groups can reduce:

• Injuries
• Fin damage
• Abnormal growth

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🍽️ Fry Diet

Growing L273 fry require:

PROTEIN-RICH FOODS

Suitable options include:

• Fine crustacean foods
• Baby brine shrimp
• Fine insect foods
• Quality protein-rich sinking foods

while maintaining extremely clean water.

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🧬 Preserve L273 Lines

Because L273 remains scientifically undescribed:

ACCURATE BREEDING RECORDS ARE ESPECIALLY IMPORTANT

Preserve:

• L273 identification
• Parent information
• Collection locality when known
• Breeder information

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⚠️ Do Not Mix Pseudacanthicus Lines

Avoid deliberately breeding L273 with:

• L024
• L025
• L097
• L114
• Other Pseudacanthicus

and later selling the offspring as:

PURE L273

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🌎 Conservation Status

Because L273 remains:

SCIENTIFICALLY UNDESCRIBED

it does not currently have its own formal species-level IUCN Red List assessment.

Therefore:

IUCN STATUS: NOT EVALUATED

is the most accurate wording.

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⚠️ Not Evaluated Does Not Mean Unlimited

The lack of a formal IUCN assessment does not mean wild populations face no potential pressures.

Possible concerns throughout Amazonian river systems can include:

• Habitat alteration
• Water-quality changes
• Mining
• Development
• Hydroelectric projects
• Ornamental collection

Responsible sourcing remains important.

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🌱 Captive Breeding Is Valuable

Because L273 is now proven capable of captive reproduction, responsible breeding can:

• Reduce reliance on wild collection
• Preserve aquarium bloodlines
• Improve husbandry knowledge
• Increase captive availability

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⭐ Why Keep an L273 Titanicus Pleco?

The L273 combines:

• 🔥 Spectacular orange, gold, and dark patterning
• 🌵 Massive cactus-like odontodes
• 🛡️ Heavy armored body
• 🐟 Huge fins
• 🌊 Rio Tapajós origin
• 📏 Approximately 14–16 inch adult potential
• 🦐 Specialized protein-oriented feeding
• 🌙 Nocturnal behavior
• 😠 Powerful territorial personality
• 🥚 Confirmed captive breeding
• 👨‍👧 Male parental care
• 🧬 Scientifically undescribed L-number identity

into one of the most impressive large plecos in the aquarium hobby.

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⚠️ Important Considerations

Before purchasing an L273 Titanicus Pleco:

• Keep the scientific identification as Pseudacanthicus sp. L273.
• L273 remains scientifically undescribed.
• Do not invent a species name.
• L273 originates from the Rio Tapajós in Pará, Brazil.
• Preserve collection locality whenever possible.
• This listing is for wild-caught fish.
• The current specimen is approximately 8 inches.
• Coloration is highly variable.
• Juvenile coloration may change dramatically with age.
• Do not guarantee that bright orange or red coloration will remain unchanged.
• Adults commonly exceed 12 inches.
• Specialist records document 35–40+ cm fish.
• Plan for approximately 14–16 inches.
• Provide approximately 125 gallons minimum.
• 180+ gallons is preferred for a large adult.
• A long, wide aquarium is strongly recommended.
• Provide large caves and strong structural cover.
• Secure all heavy décor.
• Maintain approximately 79–86°F.
• Maintain very high dissolved oxygen.
• Provide moderate to strong water movement.
• Maintain ammonia and nitrite at zero.
• Keep nitrate low.
• Use powerful mechanical and biological filtration.
• Feed a strongly protein-oriented diet.
• Shrimp, prawn, mussel, krill, and insect foods are excellent choices.
• Do not purchase L273 as an algae cleaner.
• L273 is not a specialized wood eater.
• Do not claim wood is required for digestion.
• Expect territorial behavior toward large bottom dwellers.
• Mature adults can injure one another.
• Handle carefully because of powerful spines and odontodes.
• Captive breeding has been documented.
• L273 is a cave spawner.
• Males guard the eggs.
• Breeding should be considered an advanced project.
• Keep breeding lines separate from other Pseudacanthicus.
• L273 has no formal species-level IUCN assessment.
• Never release aquarium fish into natural waterways.

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🧬 Taxonomy

The safest current identification is:

Pseudacanthicus sp. L273

Classification:

• Order: Siluriformes
• Family: Loricariidae
• Subfamily: Hypostominae
• Tribe: Acanthicini
• Genus: Pseudacanthicus
• Species: Undescribed
• L-Number: L273

Native aquarium locality:

RIO TAPAJÓS – PARÁ, BRAZIL

For this product, use:

L273 Titanicus Pleco – (Pseudacanthicus sp. L273)

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🔢 L-Number & Lineage Disclaimer

Because L273 has not yet received a formal scientific species name:

THE L-NUMBER IS ESPECIALLY IMPORTANT

Preserve:

• L273 designation
• Rio Tapajós locality information
• Supplier records
• Breeding records
• Parentage

Do not intentionally mix L273 with other Pseudacanthicus lines and later market the offspring as pure Titanicus Plecos.

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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

The current large L273 requires:

A REUSABLE / HEAVY-DUTY SHIPPING BAG

Large L273 specimens require extra packing care because of their:

• Strong pectoral spines
• Large dorsal spine
• Heavy armor
• Extensive odontodes

These structures can puncture ordinary thin fish bags.

Larger specimens may require:

• Heavy-duty or reusable bags
• Multiple protective bag layers
• Larger insulated shipping containers
• Additional water
• Specialized packing
• Airline cargo shipping depending on size and destination

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 Pseudacanthicus sp. L273 may legally be purchased, possessed, transported, and received in their state or local jurisdiction before ordering.

Never release aquarium fish into natural waterways.