Panaque cochliodon (L240) Breeding Guide

Breeding the Blue-Eyed Panaque (Panaque cochliodon, L240): a large wood-eating cave-spawner where the male guards the clutch. Sexing, setup and fry care.

Overview

Panaque cochliodon (Steindachner, 1879), the Blue-Eyed Panaque (L240), is a large loricariid from the Cauca and Magdalena River basins in Colombia. FishBase lists it at up to 30 cm total length, with one captive Magdalena specimen reaching 45 cm SL, and assesses it as Near Threatened (IUCN, 2014). It is a wood-eating (xylophagous) pleco and, like its genus, a cave spawner with paternal egg care. Aquarium breeding of this very large species is rare and demands a vast, well-equipped system.

Sexing

Sexing follows the genus pattern: mature males develop bristle-like odontodes, most obvious around the head and along the pectoral-fin spines, and tend to have broader heads, while females in condition are plumper and rounder when seen from above. In Panaque generally these odontodes intensify in the breeding season.

Conditioning

This species feeds extensively on wood; Wikipedia notes Panaque possess spoon-shaped, scraper-like teeth used to chisel wood, and that algae and aufwuchs are also an important part of the diet. A constant supply of soft driftwood is therefore mandatory for conditioning, supplemented with vegetables. Provide clean, well-oxygenated, fast-flowing water.

Breeding Setup

Because adults can exceed 40 cm, only a very large tank with multiple oversized caves and substantial driftwood is realistic. Maintain the species' tolerated range of about 24-28 degrees C and pH 6.5-7.5 with brisk current and high oxygen levels. Caves must be large enough for an adult male to occupy and defend.

Spawning Behavior & Trigger

As a cave-spawning Panaque, the female enters the male's cave to lay an adhesive clutch; the male then fertilises, blocks the entrance and guards and fans the eggs. In related wood-eating plecos, breeding is encouraged by simulating the rainy season with cooler, softer large water changes and increased flow and oxygenation.

Egg & Fry Care

The male tends the clutch within the cave until the fry hatch. Newly hatched larvae rely on their yolk sacs and, as in other wood-eating panaques, soon require access to soft wood; without wood many young loricariid xylophages die or grow very slowly. Fine vegetable foods support them alongside the wood.

Common Challenges

Documented aquarium spawnings of this exact L-number are scarce, so the protocol leans on the well-described Panaque genus pattern; this is flagged so the guidance is not over-stated. The main obstacles are the enormous adult size, the strict wood requirement for both adults and fry, and the need for powerful filtration and oxygenation.