Longfin Lemon Pleco Care Guide

Ancistrus cirrhosus

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Bioload Score

6000

PeacefulEasy
Max Size
15 cm / 5.9"
Temperature
22–28°C (72–82°F)
pH Range
6 – 7.5
Min Tank Size
80L (21 gal)
Min Group Size
Can be kept alone
Tank Level
Bottom
Origin
South America
Temperament
Peaceful
Difficulty
Easy
Breeding Difficulty
Moderate

Diet

Primarily herbivorous, grazing algae and biofilm while also eating vegetables and sinking foods.

Community Compatibility

Suitable tankmates include peaceful tetras, rasboras, danios, livebearers, Corydoras, peaceful dwarf cichlids and other non-aggressive community fish.

Good to Know

The Longfin Lemon Pleco is a selectively bred golden colour form of Ancistrus cirrhosus, distinguished by its striking elongated fins.

Gender Differences

Males usually grow larger facial bristles across the snout, while females have fewer, shorter bristles or none and are often broader-bodied.

About the Longfin Lemon Pleco

The Longfin Lemon Pleco is a golden-yellow ornamental form of the bristlenose catfish, with a compact, armored body and dramatically extended fins. Its colour can range from pale lemon to rich yellow, often contrasting with darker eyes and subtle patterning on the fins. Like other longfin varieties, its flowing finnage gives it a particularly elegant appearance.This species is a peaceful, largely nocturnal or crepuscular bottom dweller. It uses its sucker-shaped mouth to cling to solid surfaces and rasp at algae, biofilm and other natural growth, while its broad head and armored plates provide protection. Mature males develop the characteristic bristles on the snout that give bristlenose catfish their common name.Ancistrus cirrhosus originates in the freshwater habitats of South America, where related populations inhabit rivers, streams and flooded forest environments. These waters can vary considerably in flow and clarity, but generally provide abundant submerged surfaces for grazing and sheltered spaces among wood, rocks and vegetation.The Longfin Lemon Pleco is not a naturally occurring wild species but a selectively developed aquarium strain, combining the golden colour mutation with elongated fins. It remains recognisably similar in behaviour and body form to the standard bristlenose pleco and is valued by aquarists for its unusual appearance and useful algae-grazing habits.Although often sold simply as a lemon or gold bristlenose, this fish should not be confused with unrelated pleco species marketed as golden or lemon plecos. Its relatively modest adult size and peaceful disposition have made it one of the most popular ornamental Ancistrus varieties.

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