Pleco l234 - Megalancistrus parananus

Scientific name: Megalancistrus parananus

Common name: Pleco l234

Family: Loricariidae

Usual size in fish tanks: 55 - 62 cm (21.65 - 24.41 inch)

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Recommended pH range for the species: 5.8 - 7.5

Recommended water hardness (dGH): 6 - 26°N (107.14 - 464.29ppm)

0°C 32°F30°C 86°F

Recommended temperature: 22 - 27 °C (71.6 - 80.6°F)

The way how these fish reproduce: Spawning

Where the species comes from: South America

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Bottom levels

Food and feeding

Megalancistrus parananus, known as Pleco L234, is an omnivorous bottom-dweller that prefers a protein-rich diet. In the aquarium, offer high-quality sinking pellets or wafers designed for carnivorous or omnivorous plecos. Supplement their diet with shrimp pellets, bloodworms, and brine shrimp. Occasional offerings of vegetables such as cucumber slices or zucchini are also appreciated. Feed at dusk or after lights are dimmed, as they are more active at night.

Origin

This species is native to South America and occurs in the tributaries of the Paraná and Amazon River basins, particularly in Brazil, Paraguay, and Uruguay. They inhabit fast-flowing, oxygen-rich waters with rocky substrates and submerged driftwood.

Sexing

There are no prominent external differences between males and females, making sexing difficult. In mature specimens, subtle head shape differences and odontode (bristle) development on the pectoral fins may be observed.

Breeding

Due to their massive adult size (up to 62 cm or 24.4 inches), breeding Megalancistrus parananus in captivity is extremely challenging and rarely reported. In the wild, they are cave spawners. Successful breeding would require a very large tank or pond with strong current, hiding spots, and carefully controlled water parameters.

Lifespan

This pleco species can live for over 20 years with proper care, making it a long-term commitment for any aquarist.

Short description

Megalancistrus parananus is one of the largest pleco species kept in aquariums, reaching over 60 cm in length. Despite its peaceful nature, adult males can become territorial, especially toward other large bottom-dwellers or similar-shaped plecos. A tank of at least 1000 liters (260 gallons) is recommended to house a single specimen comfortably. Any tank décor must be secure, as their strength allows them to easily displace rocks or wood. These plecos are rare in the aquarium trade and usually carry a high price tag.

Suitable tankmates

Due to their size and territorial nature in adulthood, Pleco L234 should be kept with large, peaceful species that occupy different tank levels. Avoid keeping multiple adult males together unless the tank is extremely spacious. Suitable tankmates include:

Recommended plants

Due to their large size and strong body, Megalancistrus parananus may uproot or damage delicate plants. Choose robust species that can be anchored to driftwood or rocks. Suitable plants include: