Common Whiptail Catfish
Rineloricaria eigenmanni
 
The Common Whiptail Catfish is a slender, armored species native to South America, known for its long, whip-like tail and unique twig-like appearance. Its body is flattened and camouflaged in earth tones, helping it blend into sandy and leaf-littered substrates. Despite its exotic look, it is peaceful, hardy, and well-suited to community aquariums.
This species spends most of its time on the bottom, grazing on biofilm or resting among plants and driftwood. It's best kept in groups or pairs, especially in soft, well-oxygenated water with a moderate current.
 
Species Overview
Common Name: Common Whiptail Catfish
Scientific Name: Rineloricaria eigenmanni
Origin: Amazon and Orinoco River basins (South America)
Maximum Size: 13–15 cm
Lifespan: 8–10 years
Temperament: Peaceful
Swimming Level: Bottom dweller
Compatibility: Excellent with small to medium peaceful species
 
Aquarium Requirements
Minimum Tank Size: 80–100 litres
Substrate: Fine sand or smooth gravel
Décor: Driftwood, smooth rocks, and leaf litter for cover
Plants: Appreciated – floating and rooted plants provide shade
Lighting: Low to moderate
Filtration: Moderate to strong flow (they prefer oxygenated water)
Tank Cover: Recommended – they are calm but can dart when spooked
 
Water Parameters
Temperature: 22–28°C
pH: 6.0–7.5
Hardness: Soft to moderately hard (2–12 dGH)
Water Movement: Gentle to moderate
 
Diet
Diet Type: Omnivore
Preferred Foods:
– Algae wafers, sinking catfish pellets
– Blanched vegetables (zucchini, spinach, cucumber)
– Frozen foods: bloodworms, daphnia
Feeding Frequency: Once or twice daily
Feeding Tips: Supplement with driftwood and veggie matter for digestion
 
Breeding
Cave spawners
Males guard eggs laid inside tubes or crevices
Fry can be raised on powdered fry food and blanched vegetables
A dedicated breeding tank increases success
 
Care Summary
Care Level: Easy to moderate
Temperament: Peaceful
Adult Size: 13–15 cm
Tank Size: 80+ litres
Water Temperature: 22–28°C
pH Range: 6.0–7.5
 
Diet: Omnivore – algae wafers, frozen, blanched veg
Breeding: Cave spawner – male guards eggs
Tankmates: Peaceful community fish, small cichlids, tetras, Corydoras