Bearded Whiptail Catfish

Sturisoma barbatum is found in a range of river habitats across Colombia and Venezuela, with a preference for moderately flowing clearwater and whitewater rivers. Its most striking characteristic is the development in mature males of dense, bristle-like odontodes on the cheeks and along the snout — the 'beard' from which its common name derives. This feature is absent in females and in young males, making sexing straightforward in adults.

This species reaches a substantial size and requires a spacious aquarium with good water flow and regular maintenance. It is an excellent algae grazer but should not be expected to single-handedly control a major algae outbreak — its dietary needs are better met with supplementary feeding of algae wafers and fresh vegetables. In a planted aquarium it rarely damages healthy plant tissue but may graze weakened or dying leaves.

Sturisoma barbatum is a confirmed aquarium spawner, producing clutches of pale green eggs that the male guards attentively. The eggs hatch in approximately 7–10 days at tropical temperatures and the fry are immediately able to consume soft algae and powdered vegetable food.

Water: 23–28°C, pH 6.0–7.5, soft to moderately hard (GH 3–15); moderate water movement. Tank: 150 L minimum; flat driftwood and smooth rock surfaces for egg-laying; plants optional. Feeding: Algae wafers, spirulina, fresh courgette and cucumber; supplement with blanched spinach. Breeding: Male develops cheek odontodes; guards pale green eggs; fry robust and easy to feed. Compatibility: Peaceful with most medium to large community fish; avoid nippy barbs.