Twig Catfish (Farlowella)

Geographic Origin and Biotope: Native to the Orinoco river basin and the Amazon. Prefers slow, clear and shallow waters, rich in oxygen, where it spends its life camouflaged among submerged roots and the branches of fallen trees.

Taxonomy and Morphology: Twig Catfish (Farlowella, Loricariidae family). Incredible example of cryptic mimicry: the body is very long, rigid and brown, indistinguishable from a dry twig. The snout extends into a very thin rostrum. Reaches 20 cm (8 inches).

Social Behavior: Extremely shy, lethargic and peaceful. Spends entire days perfectly motionless attached to the glass or, preferably, vertically on the woods. Moves only at dusk or if disturbed. Totally inoffensive.

Coloration and Sexual Dimorphism: Faded olive-brown coloring along the back and light belly, crossed by two narrow longitudinal dark bands. Adult males develop odontodes (small fleshy "spines" or "hairs") arranged in two rows along the sides of the snout.

Aquarium Setup: Well-established aquariums required (minimum 100 liters / 25 gallons) with dense vegetation (Vallisneria, Echinodorus) and countless intertwined branches that rise vertically, essential to make them feel safe. Very well oxygenated and filtered water without excessive turbulence.

Diet and Feeding: Strictly herbivorous and algae-eating. Incessantly scrapes biofilm, tender green algae and diatoms from the glass and woods. Given the scarcity of natural food in the aquarium, it MUST be fed daily with boiled zucchini, spinach and spirulina wafers.

Water Quality: Very sensitive to pollution and chemistry. Requires soft (GH 2-10) and acidic (pH 6.0-7.0) waters at 24-26°C (75-79°F). Nitrates must be tending to zero. The drop in oxygen or thermal shocks lead to certain and sudden death.

Compatibility and Tankmates: Ultra-delicate fish, suitable only for very calm Amazonian community tanks with small Characins (Neons, Cardinals), dwarf Corydoras and Apistogramma. Any restless, fast or vaguely aggressive fish will condemn it to death by starvation by stealing its food.

Aquarium Reproduction: Difficult but possible. They lay their eggs (amber or green colored) in small clusters on the aquarium glass or on broad leaves, usually at night. The male will assiduously guard and clean the clutch until hatching (about a week).

Risks and Diseases: The main risk is wasting and death from starvation: they have a very long intestine that can never remain empty. They are the first target of chemical fluctuations. Beware of the net: their armored scales get tangled easily breaking the long snout.