🟢 L200 Green Phantom Pleco – (Hemiancistrus subviridis) – Wild-Caught Upper Orinoco Pleco

The L200 Green Phantom Pleco (Hemiancistrus subviridis) is one of the most distinctive South American plecos, famous for its beautiful olive-green to yellow-green body covered with contrasting cream, yellow, or pale golden spots.

Depending on the individual and collection locality, the body may appear:

• Olive green
• Yellow-green
• Dark green
• Brownish green
• Gray-green

with numerous pale spots concentrated especially across the:

• Head
• Front half of the body
• Dorsal fin
• Pectoral fins

The Green Phantom originates from the upper Rio Orinoco region of Venezuela and Colombia, where it inhabits warm, flowing, highly oxygenated water and shelters within cracks and spaces among large granite rocks.

L200 was formally described in 2005 as:

Hemiancistrus subviridis

The species should not be confused with the L200 Hi Fin Green Phantom, which is a completely different species:

Baryancistrus demantoides

Both historically received the aquarium number L200 because of their similar green coloration, but they can be distinguished anatomically and should always be maintained and identified separately.

The Green Phantom is an omnivorous aufwuchs grazer, consuming algae, biofilm, detritus, and small invertebrate foods. It should therefore receive a balanced diet containing both plant-based foods and meaningful animal or insect protein.

This listing is for:

WILD-CAUGHT L200 GREEN PHANTOM PLECOS

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🔎 Quick Facts – L200 Green Phantom Pleco

• 📛 Common Name: Green Phantom Pleco
• 📛 Other Names: L200 Green Phantom Pleco
• 🔢 L-Number: L200
• 🔬 Scientific Name: Hemiancistrus subviridis
• 📅 Formally Described: 2005
• 🐟 Family: Loricariidae
• 🧬 Subfamily: Hypostominae
• 🌿 Stock: Wild Caught
• 📏 Current Size: Approximately 4–5 inches
• 🌎 Origin: South America
• 🌊 Native Drainage: Upper Rio Orinoco and Rio Casiquiare systems
• 🇻🇪 Primary Native Range: Venezuela
• 🇨🇴 Broader Modern Range: Orinoco Basin of Venezuela and Colombia
• 📍 Type Locality: Rio Orinoco, Amazonas, Venezuela
• 🪨 Natural Habitat: Granite cracks and interstitial spaces in flowing water
• 💧 Water Type: Freshwater
• 📏 Scientific Record: Approximately 15 cm / 5.9 inches standard length
• 📏 Adult Planning Size: Approximately 8–10 inches total length
• 🏠 Recommended Aquarium: 75 gallons or larger
• 👥 Groups / Breeding Colonies: Approximately 90–125+ gallons
• 📐 Aquarium Shape: Long and wide aquarium strongly preferred
• 🌡️ Temperature: Approximately 79–86°F
• 💧 pH: Approximately 6.0–7.2
• 💦 Water: Soft to moderately mineralized
• 💨 Oxygenation: High
• 🌊 Water Movement: Moderate to Strong
• 🍽️ Diet: Omnivorous Aufwuchs Grazer
• 🌿 Algae / Vegetable Foods: Important
• 🦐 Animal / Insect Protein: Important
• 🚫 Algae Cleaner: Should not be purchased solely for algae control
• 😌 Temperament: Generally peaceful toward midwater fish
• ⚠️ Pleco Temperament: Territorial around caves and similar bottom dwellers
• 🌙 Activity: Primarily crepuscular / nocturnal
• 🥚 Breeding: Cave Spawner
• 👨‍👧 Parental Care: Male guards eggs and developing fry
• ⭐ Care Level: Intermediate
• 🌎 Conservation Status: Least Concern

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🧬 Formally Described Species

The currently accepted scientific name is:

Hemiancistrus subviridis

The species was formally described in:

2005

by:

• David C. Werneke
• Mark H. Sabaj Pérez
• Nathan K. Lujan
• Jonathan W. Armbruster

The scientific name remains valid in the current Catalog of Fishes.

Therefore, the correct modern identification is:

L200 Green Phantom Pleco – (Hemiancistrus subviridis)

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🌿 What Does subviridis Mean?

The species name:

subviridis

refers approximately to:

GREENISH

which is an appropriate name for a fish famous for its unusual olive-green to yellow-green coloration.

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🟢 Appearance

The Green Phantom has a distinctive body coloration uncommon among plecos.

Typical colors include:

• Olive green
• Yellow-green
• Dark moss green
• Brown-green
• Gray-green

covered with pale spots that may appear:

• Yellow
• Cream
• Pale gold
• Yellow-white

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✨ Spotting

The pale spots are usually most numerous on the:

• Head
• Cheeks
• Front half of the body
• Pectoral fins
• Dorsal fin

Spot size and density can differ greatly between individuals.

Some adults may have:

• Dense small spots

while others develop:

• Fewer larger spots

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🔄 Geographic Color Variation

Green Phantom coloration can vary noticeably depending on collection locality.

Specialist observations have documented a geographic color gradient, with some populations being:

• Darker green
• More heavily spotted

and others becoming:

• Lighter green
• More yellow-green
• Less intensely spotted

as location changes along the river system.

Therefore:

EXACT ADULT GREEN COLOR CANNOT BE GUARANTEED

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⚠️ Color Disclaimer

The Green Phantom can change color according to:

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

A newly imported fish may temporarily appear:

• Gray
• Brown
• Pale olive

and become considerably greener after settling.

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🔢 Two Different Fish Are Called L200

This is one of the most important identification issues with this pleco.

The aquarium number:

L200

was historically applied to:

TWO COMPLETELY DIFFERENT SPECIES

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🟢 Standard L200 Green Phantom

Hemiancistrus subviridis

and:

🟢 L200 Hi Fin Green Phantom

Baryancistrus demantoides

These fish look similar but are:

NOT THE SAME SPECIES

and are not even placed in the same genus.

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🆚 L200 Green Phantom vs. L200 Hi Fin

A reliable anatomical feature separates them.

Standard L200 – Hemiancistrus subviridis

The:

DORSAL FIN IS NOT CONNECTED TO THE ADIPOSE FIN

by a membrane.

The fish generally has:

• Lower dorsal profile
• Olive-green coloration
• Pale spotting
• Typical Hemiancistrus body shape

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L200 Hi Fin – Baryancistrus demantoides

The:

DORSAL FIN IS CONNECTED TO THE ADIPOSE FIN

by a membrane.

It also typically has:

• Taller shark-like dorsal fin
• More pronounced sail appearance
• Similar green/yellow coloration

This is one of the best ways to correctly separate the two.

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⚠️ Do Not Mix the Two L200 Forms

Because they share an L-number:

ALWAYS INCLUDE THE SCIENTIFIC NAME

when listing or breeding these fish.

For this product:

L200 = Hemiancistrus subviridis

Your separate Hi Fin product should remain:

L200 Hi Fin = Baryancistrus demantoides

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🔵 L200 vs. L128 Blue Phantom

The L200 Green Phantom is also closely associated with the:

L128 Blue Phantom Pleco – (Hemiancistrus sp. L128)

L128 generally differs by displaying:

• Blue-gray coloration
• Slate coloration
• Bluish-indigo tones
• Often more numerous spots

rather than the stronger:

OLIVE / GREEN

appearance of L200.

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🧬 Is L128 the Same Species?

The exact relationship between:

L128

and:

Hemiancistrus subviridis

remains scientifically unresolved.

Their:

• Body structure
• Geography
• Spotting
• General appearance

are extremely similar.

Intermediate-looking populations have contributed to speculation that L128 could represent a geographic form of the Green Phantom complex.

However:

L128 HAS NOT BEEN FORMALLY IDENTIFIED AS H. subviridis

Therefore:

• Keep L128 as L128
• Keep L200 as L200
• Do not substitute the scientific names
• Do not mix breeding lines if preserving aquarium phenotypes

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🌎 Native Distribution

Hemiancistrus subviridis occurs primarily within the:

UPPER RIO ORINOCO SYSTEM

Current scientific records include the:

• Rio Orinoco
• Rio Ventuari
• Rio Casiquiare
• Rio Iguapo region

The species occurs within the broader Orinoco system of:

• 🇻🇪 Venezuela
• 🇨🇴 Colombia

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📍 Type Locality

The holotype was collected from the:

RIO ORINOCO

approximately:

117 KM WEST OF LA ESMERALDA

in:

AMAZONAS, VENEZUELA

The original type specimen measured approximately:

133.5 MM STANDARD LENGTH

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🌊 Scientific Distribution

Scientific records document the species from the Orinoco:

UPSTREAM OF THE ATURES RAPIDS

through parts of the upper river system.

Records include:

• Rio Orinoco
• Rio Ventuari
• Rio Casiquiare

with populations extending through substantial portions of this rocky river region.

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🪨 Natural Habitat

Wild Green Phantoms are found most frequently in:

CRACKS AND INTERSTITIAL SPACES AMONG GRANITIC ROCKS

in:

FLOWING WATER

This makes rock structure especially important in captivity.

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🪨 Granite Crevice Specialist

The natural habitat contains:

• Granite boulders
• Large stones
• Rock cracks
• Narrow crevices
• Submerged cavities

The fish uses these structures for:

• Shelter
• Territory
• Resting
• Feeding
• Reproduction

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🏠 Aquarium Setup

A Green Phantom aquarium should contain:

• Large smooth rocks
• Rounded boulders
• Slate
• Rock crevices
• Ceramic pleco caves
• Sand or smooth gravel
• Driftwood
• Open feeding areas
• Strong filtration
• High oxygenation

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🪨 Prioritize Rockwork

Rock structure is more representative of the natural habitat than an aquarium filled primarily with wood.

Create:

• Crevices
• Caves
• Overhangs
• Narrow shelters

but make sure all rockwork is:

SECURE

A large Green Phantom can move lightweight décor.

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🏠 More Caves Than Plecos

When keeping multiple specimens:

PROVIDE MORE SHELTERS THAN FISH

This reduces competition over preferred territories.

Suitable shelters include:

• Ceramic tubes
• Large pleco caves
• Rock cavities
• Slate caves

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📏 Adult Size – Important Correction

Your older listing uses:

UP TO 5 INCHES

That is too small for responsible planning.

FishBase documents Hemiancistrus subviridis at approximately:

15 CM / 5.9 INCHES STANDARD LENGTH

Standard length:

DOES NOT INCLUDE THE FULL TAIL

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📏 Aquarium Adults Can Be Larger

Experienced specialist breeders report mature males approaching:

25 CM / APPROXIMATELY 10 INCHES TOTAL LENGTH

with females often remaining somewhat smaller.

Because individual size varies, a safer customer planning range is:

APPROXIMATELY 8–10 INCHES

rather than assuming the fish stops at five inches.

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🏠 Aquarium Size

Your current product page recommends:

30+ GALLONS

I would increase that substantially.

For one mature Green Phantom:

75 GALLONS OR LARGER

is a much better long-term starting point.

For:

• Groups
• Breeding colonies
• Several large plecos

consider:

90–125+ GALLONS

depending on aquarium footprint.

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📐 Bottom Area Matters

Green Phantoms spend most of their time around:

• Rocks
• Caves
• Substrate

so:

LENGTH + WIDTH

matter more than excessive aquarium height.

Provide enough floor area for each mature fish to establish territory.

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🌡️ Warm-Water River Pleco

The Green Phantom is a:

WARM-WATER SPECIES

A practical long-term range is:

79–86°F / 26–30°C

Some references allow somewhat warmer temperatures, but oxygen availability becomes increasingly important as temperature rises.

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💨 HIGH OXYGENATION

This is one of the most important husbandry requirements.

The species naturally occupies:

FLOWING, OXYGEN-RICH WATER

Warm water also naturally holds less dissolved oxygen.

Use:

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

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🌊 Water Movement

Provide:

MODERATE TO STRONG WATER MOVEMENT

Water movement does not need to travel in one extreme directional torrent.

The goal is:

HIGH WATER TURNOVER + HIGH OXYGEN + CLEAN WATER

with protected resting areas behind rocks.

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🔄 Water Turnover

Experienced Green Phantom keepers often use strong circulation capable of turning the aquarium volume over many times per hour.

Rather than focusing only on one flow number, prioritize:

• Strong oxygen exchange
• No stagnant areas
• Efficient waste removal
• Resting zones behind rockwork

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💧 Water Parameters

A practical aquarium range is:

• 🌡️ Temperature: Approximately 79–86°F
• 💧 pH: Approximately 6.0–7.2
• 💦 Hardness: Soft to moderately mineralized
• 💨 Oxygenation: High
• 🌊 Flow: Moderate to Strong
• ☠️ Ammonia: 0 ppm
• ☠️ Nitrite: 0 ppm
• 🔄 Nitrate: Keep low

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⚠️ Water Quality Matters

Wild Green Phantoms can be sensitive to:

• Poor oxygenation
• High nitrate
• Accumulated organic waste
• Abrupt chemistry changes
• Poor acclimation

Regular partial water changes are strongly recommended.

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💩 Filtration

Use strong:

• Mechanical filtration
• Biological filtration
• Circulation

Suitable systems include:

• Large canister filters
• Sump filtration
• Supplemental sponge filters
• Powerheads

Larger adults can consume substantial food and produce meaningful waste.

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🍽️ Diet – Omnivorous Aufwuchs Grazer

The older description of:

PRIMARILY HERBIVOROUS

is too simplistic.

Green Phantoms are better described as:

OMNIVOROUS AUFWUCHS GRAZERS

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🔬 What Is Aufwuchs?

Aufwuchs is the living layer that develops naturally on submerged surfaces.

It contains:

• Algae
• Biofilm
• Bacteria
• Detritus
• Microorganisms
• Small invertebrates

A wild L200 grazes this mixed biological community.

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🧪 Scientific Dietary Evidence

Stable-isotope research summarized by specialist loricariid keepers suggests the Green Phantom has both:

PLANT

and:

ANIMAL

components in its natural diet.

Therefore, it should not be maintained exclusively on vegetables.

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🌿 Plant & Algae Foods

Suitable plant-based foods include:

• Quality algae wafers
• Spirulina wafers
• Vegetable-based sinking pellets
• Zucchini
• Squash
• Sweet potato
• Cucumber
• Blanched spinach
• Kale
• Quality gel foods

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🦐 Protein Foods

Animal and insect foods should also be offered regularly.

Suitable foods include:

• Mysis shrimp
• Brine shrimp
• Bloodworms
• Mosquito larvae
• Krill
• Chopped shrimp
• Insect-based sinking foods
• Quality omnivore pellets

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⚖️ Balanced Feeding

The ideal diet combines:

ALGAE + VEGETABLES + BIOFILM + ANIMAL / INSECT PROTEIN

Do not feed exclusively:

• Vegetables

or exclusively:

• High-protein carnivore foods

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🚫 Not Just an Algae Cleaner

The Green Phantom does graze algae-containing surfaces.

However:

DO NOT PURCHASE IT SIMPLY TO CLEAN AN AQUARIUM

It requires intentional feeding.

Aquarium algae alone is not a complete diet.

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🪵 Driftwood

Driftwood can be included for:

• Shelter
• Shade
• Biofilm
• Territory
• Natural appearance

However:

L200 IS NOT A SPECIALIZED WOOD-EATING PLECO

Rockwork and caves should be especially prominent because granite crevices are central to its natural habitat.

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🌙 Activity

Green Phantoms are primarily:

CREPUSCULAR / NOCTURNAL

They may remain hidden during bright daylight, especially when newly imported.

Activity generally increases:

• At dusk
• During feeding
• After lights dim
• During nighttime

Established specimens may become quite visible during the day.

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🧪 Wild-Caught Acclimation

This listing is for:

WILD-CAUGHT L200 GREEN PHANTOM PLECOS

Careful acclimation is especially important.

After arrival:

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

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🍽️ Confirm Feeding

Imported Green Phantoms sometimes arrive thin or stressed.

Watch for:

• Sunken abdomen
• Hollow body profile
• Rapid breathing
• Persistent refusal to feed

Offer food:

• Near shelters
• At dusk
• After lights out
• In several locations

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😌 Temperament

Toward most midwater fish, L200 is generally:

PEACEFUL

Suitable tankmates may include appropriately selected:

• Tetras
• Pencilfish
• Characins
• Corydoras
• Peaceful South American cichlids

provided they tolerate warm, oxygen-rich water.

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⚠️ Territorial Toward Similar Plecos

Adult Green Phantoms can become:

TERRITORIAL

toward:

• Other L200s
• L128 Blue Phantoms
• Similar large plecos
• Other cave-dwelling bottom fish

especially when caves are limited.

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⚔️ Territorial Disputes

Conflict may include:

• Chasing
• Pushing
• Cave blocking
• Pectoral-fin contact
• Odontode contact

Reduce conflict by providing:

• Large floor area
• Multiple caves
• Visual barriers
• Multiple feeding areas

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♂️ Male vs. Female

Sexual differences become clearer in mature fish.

Mature Males

Usually develop:

• Broader head
• Heavier head profile
• Thick cheek odontodes
• Strong pectoral-fin odontodes
• Additional body odontodes
• Strong cave territoriality

Mature Females

Generally:

• Have less extensive odontode development
• Develop a fuller abdomen when carrying eggs
• Remain somewhat smaller on average

Juveniles can be difficult to sex.

Unless confidently identified:

SELL AS UNSEXED

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🥚 Captive Breeding – Confirmed

The L200 Green Phantom has been:

SUCCESSFULLY BRED IN HOME AQUARIUMS

It is a:

CAVE-SPAWNING PLECO

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🏠 Breeding Caves

Provide several large caves constructed from:

• Ceramic pleco tubes
• PVC-style breeding tubes
• Stacked rock
• Slate

The cave should be:

• Closed at one end
• Large enough for the adult fish
• Narrow enough for the male to defend
• Positioned in well-oxygenated water

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💕 Spawning Behavior

Typical documented spawning behavior includes:

1. A mature male establishes a cave.
2. A receptive female enters.
3. Eggs are deposited and fertilized.
4. The female leaves.
5. The male remains with the clutch.

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👨‍👧 Male Parental Care

After spawning:

THE MALE GUARDS THE EGGS

He:

• Fans the clutch
• Protects the eggs
• Guards the cave entrance
• Remains with the developing brood

The female generally takes no further part in parental care.

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🥚 Clutch Size

Documented captive breeding reports commonly describe approximately:

30–40 LARGE YELLOW EGGS

per spawn.

Actual clutch size can vary depending on:

• Female size
• Age
• Conditioning
• Genetics

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🐣 Hatching

At warm temperatures, eggs commonly hatch after approximately:

3–5 DAYS

depending on:

• Temperature
• Oxygenation
• Water quality

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👶 Fry

After hatching, fry initially rely on their:

YOLK SACS

for approximately another week.

Once actively feeding, suitable foods include:

• Fine sinking omnivore foods
• Crushed algae wafers
• Small insect foods
• Baby brine shrimp
• Fine frozen foods
• Vegetable-containing fry foods

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⚠️ Fry Need Extremely Clean Water

Green Phantom fry can be sensitive to:

• Rotting food
• Bacterial buildup
• Dirty substrate
• Poor oxygenation

Feed small portions frequently and remove uneaten food.

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💧 Breeding Conditions

Breeding success is associated with:

• Mature compatible adults
• Warm water
• Soft water
• High oxygen
• Strong circulation
• Excellent filtration
• Large water changes
• Multiple caves
• Well-conditioned fish

There is no single guaranteed spawning formula.

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🧬 Preserve L200 Lines

Because of the confusion involving:

• L200 Hemiancistrus subviridis
• L200 Hi Fin Baryancistrus demantoides
• L128 Blue Phantom

accurate breeding records are extremely important.

Do not mix these forms and later sell the offspring as pure L200 Green Phantom.

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⚠️ Keep L200 & L128 Separate

Even though the taxonomic relationship between L128 and L200 remains interesting:

KEEP THEIR BREEDING LINES SEPARATE

Preserve:

• L-number
• Scientific identification
• Collection locality when known
• Breeder source

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🌎 Conservation Status

Hemiancistrus subviridis is currently assessed as:

LEAST CONCERN

The global IUCN assessment dates to:

2020

The species occurs across portions of the upper Orinoco and Casiquiare region.

Responsible sourcing and long-term care remain important, particularly for:

WILD-CAUGHT SPECIMENS

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⭐ Why Keep an L200 Green Phantom Pleco?

The L200 combines:

• 🟢 Beautiful olive-green coloration
• ✨ Cream to golden spotting
• 🌊 Upper Orinoco origin
• 🪨 Granite-crevice behavior
• 📏 Impressive approximately 8–10 inch adult potential
• 🍽️ Interesting omnivorous aufwuchs feeding
• 🌙 Nocturnal personality
• 🥚 Confirmed captive breeding
• 👨‍👧 Male parental care
• 🧬 Fascinating relationship with L128
• 🆚 Distinct identification from the L200 Hi Fin

into one of the most impressive medium-to-large plecos available to experienced aquarium keepers.

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⚠️ Important Considerations

Before purchasing an L200 Green Phantom Pleco:

• The correct scientific name is Hemiancistrus subviridis.
• The species was formally described in 2005.
• The current Catalog of Fishes recognizes H. subviridis as valid.
• This listing is for wild-caught fish.
• The species originates from the upper Rio Orinoco and Casiquiare region.
• The type locality is in Amazonas, Venezuela.
• Green Phantoms naturally shelter among granite cracks in flowing water.
• L200 is also historically used for the Hi Fin Green Phantom Baryancistrus demantoides.
• The standard L200 and Hi Fin L200 are different species.
• H. subviridis lacks the dorsal-to-adipose membrane found in B. demantoides.
• L128 Blue Phantom remains taxonomically unresolved.
• Do not automatically identify L128 as H. subviridis.
• Keep L128 and L200 breeding lines separate.
• Do not use 5 inches as a hard adult maximum.
• Scientific specimens reach approximately 5.9 inches standard length before the tail.
• Experienced keepers document mature males approaching approximately 10 inches total length.
• Plan for approximately 8–10 inches.
• Provide approximately 75 gallons or larger.
• Use approximately 90–125+ gallons for groups.
• Provide substantial rockwork and numerous caves.
• Maintain approximately 79–86°F.
• Maintain very high dissolved oxygen.
• Provide moderate to strong circulation.
• Keep ammonia and nitrite at zero.
• Keep nitrate low.
• Feed a true omnivorous diet.
• Provide algae and vegetable foods.
• Provide regular animal and insect protein.
• Do not describe the species simply as primarily herbivorous.
• Do not purchase L200 simply as an algae cleaner.
• Expect territorial behavior toward similar plecos.
• Captive cave spawning is documented.
• Males guard the eggs and fry.
• Never release aquarium fish into natural waterways.

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🧬 Taxonomy

The currently accepted scientific name is:

Hemiancistrus subviridis Werneke, Sabaj Pérez, Lujan & Armbruster, 2005

Classification:

• Order: Siluriformes
• Family: Loricariidae
• Subfamily: Hypostominae
• Genus: Hemiancistrus
• Species: subviridis
• L-Number: L200

Current scientific distribution:

ORINOCO RIVER BASIN – VENEZUELA & COLOMBIA

with major records from:

• Rio Orinoco
• Rio Ventuari
• Rio Casiquiare

For this product, use:

L200 Green Phantom Pleco – (Hemiancistrus subviridis)

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🔢 L200 Identification Disclaimer

The aquarium designation L200 has historically been applied to two similar green plecos:

L200 Green Phantom

Hemiancistrus subviridis

and:

L200 Hi Fin Green Phantom

Baryancistrus demantoides

These are separate species.

The L128 Blue Phantom is another closely similar but still unresolved form and should remain separately identified.

Always preserve:

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

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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 Hemiancistrus subviridis may legally be purchased, possessed, transported, and received in their state or local jurisdiction before ordering.

Never release aquarium fish into natural waterways.