Farlowella paraguayensis is a species of armored catfish native to Brazil and Paraguay where it occurs in the Paraguay River basin. This species grows to a length of 17.5 centimetres (6.9 in) SL. This small catfish fish has a long snout and a narrow, long body that resembles a twig, hence the common name of twig catfish. It is available for sale as an aquarium fish and is said to be a peaceful fish that eats vegetable matter. It needs clean well oxygenated water and a sand and gravel bed. It requires warm water between 22 and 27 deg C.