L239 Panaque sp. Blue Fin 3-4 cm

Overview

The L239 Panaque sp. Blue Fin is a striking and highly sought-after pleco from the wood-eating Loricariidae family. Sold here at 3-4 cm, these juveniles are still developing their characteristic blue-toned fins and bold body pattern, making them an exciting choice for aquarists looking for something a little different from the usual pleco species. As with other Panaque, this fish is best known for its specialised diet and its habit of rasping on driftwood, which is an important part of its natural behaviour.

Although peaceful in temperament, the Blue Fin Panaque is not a “small pleco” in the long-term sense. It can grow to around 15 cm and needs a well-maintained, mature aquarium with plenty of wood, hiding places and stable water conditions. It is best suited to aquarists with some experience of keeping catfish or other sensitive tropical species. If you are looking for a rare, attractive and genuinely interesting bottom-dweller, L239 is a superb choice.

At Tropical Fish Co, we carefully acclimate and dispatch livestock with care, backed by our live arrival guarantee and fast UK delivery, so your fish arrive in the best possible condition.

Care at a Glance

Origin & Natural Habitat

L239 is a collection number used for an undescribed or informally identified Panaque species, commonly referred to as the Blue Fin Panaque. Fish in this genus originate from South American river systems, where they inhabit warm, oxygen-rich waters with submerged roots, leaf litter, sand, rocks and abundant driftwood. In nature, Panaque species are strongly associated with woody habitats and spend much of their time rasping biofilm and softened wood surfaces.

Their natural environment is typically shaded and structurally complex, with gentle to moderate flow and excellent water quality. This helps explain why they do best in aquariums that are mature, stable and richly furnished. Providing driftwood is not optional with this species; it is an essential part of both its diet and its sense of security.

Tank Setup & Water Parameters

For a juvenile of 3-4 cm, it may be tempting to house the fish in a smaller aquarium at first, but because this species grows and thrives best in a spacious, established setup, we recommend planning for the adult size from day one. A minimum of 180 litres is sensible for a single specimen, with more space preferred if keeping alongside other bottom-dwellers or active midwater fish.

Use a soft sand or very smooth fine substrate to protect the fish’s barbels and underside. Add multiple pieces of driftwood, ideally well-seasoned and varied in shape, so the fish can graze and shelter. Caves, tubes and shaded retreats are also important, as Panaque are naturally secretive during the day and may become stressed without cover.

Water should be clean, well-filtered and oxygenated, with regular maintenance to keep nitrate low. A strong external filter or high-capacity internal filtration is recommended, especially in a community aquarium. Aim for stable conditions rather than frequent parameter swings. The ideal range is 24-27°C, pH 6.5-7.5, and hardness 0-15 dGH. Moderate flow and good surface agitation will help replicate the oxygen-rich waters these catfish prefer.

Because this species can be shy, dim lighting or floating plants can help it settle in. Ensure there are no sharp decorations, and leave open floor space for foraging. A mature aquarium with natural décor will encourage more confident behaviour and better long-term health.

Feeding Guide

Blue Fin Panaques are often described as wood-eating catfish, but it is important to understand that driftwood is a dietary supplement and behavioural necessity rather than the sole food source. In captivity, they should be offered a varied diet that includes high-quality sinking catfish pellets, algae wafers, blanched vegetables such as courgette, cucumber and spinach, and occasional protein-rich foods in moderation.

Because they are slow, deliberate feeders, it is best to feed after lights out or in the evening when they are more active. Place food near their favourite hiding spots and make sure more boisterous tank mates do not outcompete them. Overfeeding should be avoided, as uneaten food can quickly affect water quality in a species that prefers pristine conditions.

Fresh driftwood should always be present, and the fish will spend time rasping it regularly. This is normal and healthy behaviour. A balanced diet, combined with wood and stable water, is the key to success with this species.

Tank Mates / Compatibility

L239 Blue Fin Panaque is peaceful and generally compatible with similarly calm fish that appreciate warm, clean water. Good tank mates include medium-sized tetras, peaceful rainbowfish, Corydoras species that suit the same temperature range, dwarf cichlids with a calm temperament, and other non-aggressive community fish that will not harass it or compete too aggressively for food.

It is best to avoid highly territorial cichlids, fin-nippers, very aggressive catfish, and overly boisterous species that may stress the fish or monopolise food. Small shrimp may be at risk if the pleco is hungry, and very tiny fish should be considered carefully depending on the overall aquarium setup. As with most plecos, compatibility improves greatly in larger aquariums with plenty of hiding places and separate feeding zones.

When kept with other bottom-dwellers, ensure there is enough space and décor to reduce competition. This species is peaceful, but it still needs its own territory and access to wood.

Why Buy from Tropical Fish Co

We specialise in quality aquatic livestock for UK hobbyists, with careful packing, reliable service and livestock selected with health and condition in mind. Your L239 Blue Fin Panaque will be shipped with our fast UK delivery service and supported by our live arrival guarantee, giving you confidence when ordering online.

We understand that rare catfish need the right handling from the moment they leave our facility to the moment they reach your aquarium. That is why we prioritise secure packaging, clear care information and responsive customer support. Whether you are building a specialist South American setup or adding a standout bottom-dweller to an established community tank, Tropical Fish Co is here to help you succeed.

Choose the L239 Blue Fin Panaque for its unusual beauty, fascinating behaviour and long-term appeal. With the right setup, this rare pleco can become a true centrepiece of your aquarium.