L34 Medusa Pleco (Ancistrus ranunculus) 4 Inches for Sale in Canada

The L34 Medusa Pleco (Ancistrus ranunculus) is a rare and highly desirable L-number pleco admired for its extraordinary appearance, compact size, and fascinating behaviour. Its unusual head structure, distinctive fleshy appendages, armoured body, and dramatic prehistoric look make it one of the most recognizable species in the specialist pleco hobby.

This listing is for an L34 Medusa Pleco measuring approximately 4 inches. At this size, it is already a substantial specimen and an excellent choice for experienced aquarists and collectors looking for a rare South American pleco with impressive visual appeal.

The Medusa Pleco is associated with the Rio Xingu region of Brazil, where many specialist aquarium fish are adapted to warm, oxygen-rich environments. In the aquarium, Ancistrus ranunculus benefits from exceptionally clean water, strong filtration, good oxygenation, and plenty of smooth rocks and secure hiding places.

Monster Aquarium Canada offers the L34 Medusa Pleco for hobbyists looking to buy rare plecos and unusual freshwater fish in Canada.

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Why Choose an L34 Medusa Pleco?

One of the Most Unusual L-Number Plecos

The L34 is instantly recognizable and highly collectible.

Key Features

Premium Characteristics

• Approximately 4 inches in size
• Rare and collectible L-number pleco
• Scientific name: Ancistrus ranunculus
• Distinctive Medusa-like facial appearance
• Compact but robust body
• Fascinating armoured freshwater catfish
• Associated with the Rio Xingu region
• Excellent choice for specialist pleco collections
• Dramatic centerpiece for a carefully planned aquarium

Individual colour, markings, and physical development may vary.

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How Large Does an L34 Medusa Pleco Grow?

A Compact Specialist Pleco

The L34 Medusa Pleco generally reaches approximately 4–5 inches (10–13 cm) as an adult.

This makes it considerably more manageable than many giant-growing plecos. However, its specialist requirements mean that a properly designed aquarium remains essential.

This 4-inch specimen is close to its potential adult size, so buyers should prepare suitable permanent housing.

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Aquarium Size and Setup

Clean, Warm, Oxygen-Rich Water Is Essential

A 30-gallon aquarium or larger is a reasonable starting point for a single adult L34 Medusa Pleco. A larger aquarium is recommended for community setups or when housing multiple bottom-dwelling fish.

Recommended Aquarium Features

• Mature biological filtration
• Strong mechanical filtration
• Excellent oxygenation
• Clean, stable water
• Moderate to strong water movement
• Smooth rocks
• Secure caves and crevices
• Shaded resting areas
• Fine or smooth substrate
• Open bottom areas

The aquarium should provide excellent water circulation without making it impossible for the fish to rest comfortably.

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Water Parameters

Basic L34 Medusa Pleco Care

• Scientific Name: Ancistrus ranunculus
• Common Name: L34 Medusa Pleco
• L-Number: L34
• Size Offered: Approximately 4 inches
• Potential Adult Size: Approximately 4–5 inches (10–13 cm)
• Origin: Brazil, Rio Xingu region
• Temperature: Approximately 26–30°C (79–86°F)
• pH: Approximately 5.5–7.5
• Water Hardness: Soft to moderately hard
• Care Level: Moderate to Advanced
• Temperament: Generally peaceful but may be territorial with other plecos
• Diet: Omnivorous
• Swimming Level: Bottom
• Activity: Often more active during dim conditions

Stable water quality and high oxygen levels are particularly important for this species.

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What Does an L34 Medusa Pleco Eat?

A Varied Omnivorous Diet

The L34 Medusa Pleco should receive a varied and nutritious diet. It should not be expected to survive exclusively on aquarium algae.

Recommended Foods

• High-quality sinking pleco pellets
• Algae wafers
• Spirulina-based foods
• Vegetable-based sinking foods
• Suitable protein-rich foods
• Frozen foods in moderation
• Repashy-style gel foods where appropriate

Important Feeding Advice

Offer food in the evening or after lights are dimmed if the pleco is shy during daytime feeding.

Monitor food intake carefully when keeping the L34 with faster community fish.

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Behaviour and Temperament

A Fascinating Bottom-Dwelling Pleco

The L34 Medusa Pleco can spend much of the day resting in caves, beneath rocks, or in shaded areas.

As it becomes comfortable, you may observe it:

• Exploring rock surfaces
• Searching for food along the bottom
• Resting in narrow crevices
• Defending a favourite cave
• Becoming more active after lights dim
• Displaying individual personality

Like many plecos, individual temperament can vary.

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Compatible Tank Mates

Choose Warm-Water Species Carefully

Tank mates should be peaceful, appropriately sized, and capable of thriving in warm, well-oxygenated water.

Possible companions may include:

• Compatible tetras
• Peaceful warm-water fish
• Carefully selected dwarf cichlids
• Other suitable catfish
• Non-aggressive community species

Avoid

• Large predatory fish
• Highly aggressive cichlids
• Fish that constantly harass bottom dwellers
• Excessively territorial plecos in limited space
• Species requiring significantly cooler water

When keeping multiple plecos, provide enough floor space and multiple separate caves.

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L34 Medusa Pleco in a Specialist Aquarium

A Rare and Dramatic Centerpiece

The L34 is an excellent fish for a specialist pleco aquarium designed around its natural behaviour.

A successful setup should prioritize:

• Warm water
• Strong filtration
• Excellent oxygenation
• Stable water parameters
• Natural rockwork
• Secure caves
• Appropriate nutrition
• Low-stress tank mates

Its unusual appearance makes it an outstanding choice for hobbyists looking for a pleco that is genuinely different from commonly available species.

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Why Buy L34 Medusa Pleco from Monster Aquarium Canada?

Rare Plecos for Canadian Aquarium Hobbyists

Monster Aquarium Canada specializes in rare freshwater fish, unusual tropical fish, L-number plecos, Bristlenose Plecos, monster fish, freshwater catfish, aquarium foods, medications, and specialist aquarium supplies.

An Impressive 4-Inch Specimen

This L34 Medusa Pleco measuring approximately 4 inches is an excellent choice for experienced aquarists looking for a rare, compact, and visually extraordinary pleco.

Before ordering, ensure your aquarium is mature and prepared to provide clean, warm, highly oxygenated water and suitable long-term housing.

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Frequently Asked Questions

1. How big is this L34 Medusa Pleco?

This listing is for a specimen measuring approximately 4 inches.

2. How large does an L34 Medusa Pleco grow?

They generally reach approximately 4–5 inches (10–13 cm) as adults.

3. What does an L34 Medusa Pleco eat?

They benefit from a varied diet including quality sinking pleco foods, algae wafers, spirulina foods, vegetable-based foods, and suitable protein-rich foods.

4. Is the L34 Medusa Pleco aggressive?

It is generally peaceful with compatible fish but can become territorial around preferred caves, especially toward other plecos.

5. What temperature does an L34 Medusa Pleco need?

They generally do well in warm water around 26–30°C (79–86°F) with excellent oxygenation and stable water quality.