Sturisomatichthys barbatum Breeding Guide

Breeding the Bearded Whiptail (Sturisomatichthys barbatum): an open spawner laying eggs on glass, with the male guarding and fanning the clutch. Sexing, setup and fry care.

Overview

Sturisomatichthys barbatum, the Bearded Whiptail (long described in the hobby as Sturisoma barbatum), is one of the most commonly kept whiptail catfish, reaching roughly 25-30 cm. Per the TFH whiptail article, unlike most loricariids these whiptails do not breed in caves but lay their eggs openly, usually on vertical aquarium panes, after which the male guards the clutch until the young hatch. It is regarded as generally easy to breed.

Sexing

Mature males develop a fringe or beard of cheek odontodes (bristles) during the breeding season, which gives the species its name and is absent in females; conditioned females are stouter and rounder when full of eggs. The TFH article notes that whiptail males generally have more bristles than females.

Conditioning

Condition a pair or group on a vegetable-led diet (algae, blanched vegetables, spirulina) with occasional small live or frozen foods, in clean, well-oxygenated water with good flow. The TFH article stresses brisk current and ample oxygen as prerequisites for bringing whiptails into spawning condition.

Breeding Setup

Provide a mature, well-oxygenated tank with smooth vertical surfaces (especially glass) for egg deposition and brisk current. Maintain stable, clean water within the species' tolerated range; strong oxygenation and flow are needed both to trigger spawning and to keep eggs and fry healthy.

Spawning Behavior & Trigger

The female lays an adhesive clutch on a smooth surface such as the glass; reported clutches for this group average about 50-75 eggs. The male then guards and fans the eggs with his fins, providing oxygen, until they hatch, usually in about 7-10 days. Cooler, softer water changes simulating the rainy season help trigger spawning.

Egg & Fry Care

The male tends the clutch until the fry are free-swimming. Per the TFH article, once whiptail fry have used up their yolk sacs they are quite easy to rear on algae, infusoria and finely powdered flake food. Continuous access to soft vegetable matter and strong oxygenation are essential.

Common Challenges

Whiptail fry can starve if they cannot graze constantly, so a steady supply of algae and fine vegetable food is the main difficulty, alongside maintaining strong current and oxygenation throughout incubation and rearing.