A highly distinctive, slender, and peaceful bottom-dwelling catfish from South America. Known for its extremely elongated tail and excellent camouflaging abilities. They are non-aggressive grazers that feed on biofilm, aufwuchs, and sinking foods. Their rigid, twig-like bodies mean they need broad, smooth resting places.
Common Whiptail Catfish At a Glance
Common Whiptail Catfish Tank Requirements
Will Common Whiptail Catfish fit in your tank?
Care guides tell you what Common Whiptail Catfish needs, the next question is whether your tank can safely provide it. Test Common Whiptail Catfish against your tank size, maintenance needs, and the fish you already keep before you buy.
Useful setup supplies
We may earn from qualifying purchases
Common Whiptail Catfish Water Parameters
Water care products
We may earn from qualifying purchases
Common Whiptail Catfish Temperament & Compatibility
Common Whiptail Catfish Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard / Unsexed
Typical unsexed juvenile or standard form. Excellent, peaceful bottom dwellers that are completely safe with dwarf shrimp and small tetras.
Same care requirements as the base species
Also known as: Juvenile Whiptail
Male
Mature males develop distinct bristles (odontodes) on the sides of their head and pectoral fins. Males are excellent fathers that will guard eggs laid inside hollow PVC pipes or driftwood crevices.
Same care requirements as the base species
Also known as: Male Whiptail
Female
Females lack extensive cheek and pectoral odontodes. They have a slightly broader head and girth when viewed from above, especially when carrying eggs.
Same care requirements as the base species
Also known as: Female Whiptail
Common Whiptail Catfish Care Guide Summary
The Common Whiptail Catfish, scientifically known as Rineloricaria eigenmanni, belongs to the Catfish family group. Adults reach a maximum size of approximately 11 cm and have a depressed body shape with a slow growth rate. Classified as peaceful, this species primarily occupies the bottom zone of the aquarium and produces a low level of biological waste.
To thrive, the Common Whiptail Catfish requires a freshwater only aquarium with a minimum volume of 60 litres and a tank length of at least 60 cm. Water temperature should be maintained between 22°C and 27°C, with a pH range of 6–7.5 and a general hardness of 2–15 dGH. A moderate water flow is preferred.
Due to its specialist needs, the Common Whiptail Catfish is best suited for fishkeepers who can provide a carefully planned setup. This species is available in 3 varieties: Standard / Unsexed, Male, and Female. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Common Whiptail Catfish Habitat Setup
When setting up an aquarium for the Common Whiptail Catfish, a moderate water flow best suits their natural preferences. Because this species occupies the bottom zone, the aquarium layout should prioritise sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour, smooth gravel or rounded substrate to protect their sensitive barbels, driftwood, which can serve as both a hiding place and a dietary supplement, and leaf litter or blackwater tannins to replicate their natural soft-water habitat.
Common Whiptail Catfish Compatibility Notes
Classified as peaceful, the Common Whiptail Catfish is adaptable and can be kept singly or in a small group, offering flexibility when planning a community tank. When choosing tankmates, boisterous or fast-moving tankmates may cause this species undue stress. Selecting tankmates that favour different water layers from the bottom zone can help reduce competition and territorial overlap.
Common Whiptail Catfish Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Common Whiptail Catfish.
20 Gallon High
20 Gallon Long
29 Gallon Standard
30 Gallon Breeder
36 Gallon Bowfront
40 Gallon Breeder
Show 19 more tank sizes
Feeding products
We may earn from qualifying purchases
.webp?2026-04-25T14%3A35%3A38.022Z)
Frequently Asked Questions About Common Whiptail Catfish
How big does Common Whiptail Catfish get?
Common Whiptail Catfish (Rineloricaria eigenmanni) typically reaches a maximum adult size of approximately 11 cm. They have a depressed body shape and a slow growth rate.
What tank size does Common Whiptail Catfish need?
A minimum aquarium volume of 60 litres and a tank length of at least 60 cm are recommended for Common Whiptail Catfish. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Common Whiptail Catfish need?
Common Whiptail Catfish thrives in freshwater only conditions with a temperature range of 22–27°C, a pH between 6 and 7.5, and a general hardness of 2–15 dGH. A moderate water flow is preferred.
Is Common Whiptail Catfish peaceful or aggressive?
Common Whiptail Catfish is classified as peaceful with an aggression score of 1 out of 10. They are generally well-suited to peaceful community tanks.
Can Common Whiptail Catfish live alone?
Yes, Common Whiptail Catfish can be kept singly or in a group. They are flexible and adapt well to both setups.
Does Common Whiptail Catfish have any special tank requirements?
Yes. Common Whiptail Catfish benefits from sand (sifters), leaf litter/blackwater, smooth gravel (sensitive barbels), and driftwood (digestion/hiding) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Top Tank Mates for Common Whiptail Catfish
These fish are strong compatibility matches for Common Whiptail Catfish based on water preferences, temperament, adult size, and tank behavior.
Dwarf Rasbora
Boraras maculatus
Ideal Tank MatesDwarf Pencilfish
Nannostomus marginatus
Ideal Tank MatesFalse Glass Catfish
Kryptopterus macrocephalus
Ideal Tank MatesBetta Imbellis
Betta imbellis
Ideal Tank MatesGlowlight Tetra
Hemigrammus erythrozonus
Ideal Tank MatesMarbled Hatchetfish
Carnegiella strigata
Ideal Tank MatesPlants That Suit Common Whiptail Catfish
These plants pair well with Common Whiptail Catfish based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
African Onion Plant
Crinum calamistratum
Afzel's Anubias
Anubias afzelii
Amazon Sword
Echinodorus amazonicus
Anacharis
Egeria densa
Anubias Barteri
Anubias barteri
Ashy Pipewort
Eriocaulon cinereum
Fish Similar to Common Whiptail Catfish
Whiptail Catfish
Rineloricaria sp.
A highly cryptic, peaceful, and extremely slender catfish that mimics a twig or dead leaf. They are excellent scavengers and biofilm grazers that require smooth sand and driftwood to thrive. They are completely non-aggressive, lack the heavy armor of larger plecos, and do well in peaceful community setups.
Twig Catfish (Farlowella)
Farlowella acus
The Twig Catfish is an extremely elongated, master-of-camouflage suckermouth catfish from South America. True to its name, it mimics a dead twig perfectly, spending most of its time motionless on branches or plant leaves. It is a specialized aufwuchs and algae grazer that requires a mature tank, high oxygenation, and plenty of driftwood. They are completely peaceful but highly sensitive to fluctuating water parameters.
Striped Raphael Catfish
Platydoras armatulus
A highly robust, armored catfish native to the Amazon and Orinoco basins. Famous for their ability to produce audible squeaking or grunting sounds when distressed or defending territory. They are nocturnal scavengers that spend most of the day hiding in driftwood or caves. Note: Their rigid pectoral spines can easily become tangled in standard aquarium nets.
Banjo Catfish
Bunocephalus coracoideus
A bizarre, highly camouflaged bottom-dweller that perfectly mimics a dead leaf or piece of bark. Extremely docile and strictly nocturnal, the Banjo Catfish spends most of its daylight hours completely buried in the sand or hiding under debris. They are famous for 'playing dead' when netted or disturbed.
Loxozonus Corydoras (C079/C082)
Corydoras loxozonus
A peaceful, bottom-dwelling catfish native to the Rio Meta basin in Colombia. Known for the distinctive diagonal black stripe across its back and a mask over its eyes. Like all Corydoras, they are highly social and must be kept in groups. A soft, sandy substrate is strictly required to prevent damage to their delicate barbels as they sift for food.
Brown Bullhead Catfish
Ameiurus nebulosus
A highly adaptable, large North American catfish known for its distinct barbels and mottled brown skin. While incredibly hardy and tolerant of a wide range of water parameters, they are massive, opportunistic nocturnal predators. They will consume any tank mate small enough to fit in their cavernous mouths and produce substantial waste.