Whiptail catfish with shrimp

By the Shrimp Tank Hub editorsUpdated Oct 28, 2026Research-based

"Whiptail catfish" covers many flat, long-tailed suckermouth catfish in the subfamily Loricariinae, and Practical Fishkeeping says they are seldom sold under correct scientific names. The small ones usually seen in stores are Rineloricaria (sometimes placed in Hemiloricaria), such as the common whiptail R. parva, R. lanceolata and the red dragon whiptail R. sp. L010A (TFH, Seriously Fish). They come from South America, where Seriously Fish says R. parva (Brazil, Paraguay and Argentina) and R. lanceolata (Peru and Brazil) live among leaf litter over sand. This guide covers these small sand-dwelling whiptails, not the bigger twig catfish (Farlowella) or royal whiptails (Sturisoma), which TFH says are more demanding.

Whiptail catfish at a glance

Will whiptail catfish eat shrimp?

• Adult shrimp: safe. Practical Fishkeeping's Neale Monks names whiptail catfish among fish that pose no threat at all to shrimp, because they are strictly sand-sifters with a taste for worms.
• Shrimplets: very low risk. In TFH, Monks writes that whiptails' predatory instincts are aimed at worms and insect larvae and that they won't harm even the smallest tankmates, such as livebearer fry. Seriously Fish says that in the wild they eat aufwuchs and small aquatic crustaceans, so in our reading an occasional shrimplet found in the sand is possible.
• Eggs and berried females: eggs are safe while carried under the tail.

Moss and plants still help shrimplets survive (Aquarium Co-Op). For other bottom-dwellers that are safe with adult shrimp, compare corydoras with shrimp, kuhli loaches with shrimp and bristlenose plecos with shrimp, or see the full cherry shrimp tank mates list.

Matching the water

Seriously Fish lists 68–77 °F, pH 6.0–7.5 and 2–15 dGH for R. parva, which it says does not do well at higher temperatures, and 77–82 °F, pH 6.0–8.0 and 5–20 dGH for R. lanceolata. TFH says most species do well at 72–79 °F, hardness 3–15 and pH 6.0–7.5, preferring soft, slightly acidic water but coping with moderately hard, slightly basic water. The Shrimp Farm lists 65–80 °F, pH 6.8–8.0, GH 4–8 and KH 2–5 for cherry-type shrimp. By our comparison, the overlap is about 72–77 °F, pH 6.8–7.5 and GH 4–8 for the common whiptail; keep KH at 2–5 for the shrimp, since the whiptail sources don't give a KH figure. R. lanceolata as Seriously Fish describes it wants 77–80 °F, the warm edge of the cherry range. See shrimp tank pH, GH and KH explained and shrimp tank temperature.

Tank size and setup

• Size: Seriously Fish says a small group of R. parva fits a 30 × 12 × 12 in tank (about 18 US gallons), and TFH allows 3 to 4 gallons per fish. Practical Fishkeeping says their long, armored bodies are inflexible, so they need room to maneuver even though they don't need swimming space. That makes them a poor fit for the 5- to 10-gallon tanks many shrimp keepers use (our reading).
• Sand and leaves: Seriously Fish suggests a layer of sand with dried oak or beech leaves, twisted branches and rounded stones, and caves or PVC pipes for spawning; a well-planted tank works too, but not very bright light. TFH recommends smooth, lime-free silica sand, which won't change water chemistry, and low plants with open areas between them. Leaves and moss also suit shrimp. See driftwood and botanicals for shrimp and java moss for shrimp.
• Shrimp-safe intake: a sponge filter or pre-filter keeps shrimplets out of the intake (our suggestion). See shrimp-safe filters.
• Start mature. See how to cycle a shrimp tank.

Group size and behavior

Seriously Fish says whiptails are not territorial unless spawning and are best kept in a small group. TFH calls them gregarious, says nesting males can be mildly territorial but only scare off rivals, and notes that Rineloricaria breed like bristlenose catfish: the male guards eggs in a tube or cave. Practical Fishkeeping says males in breeding condition develop bristles on the snout, cheeks and sometimes the pectoral fins. TFH says the fry eat algae and fine foods once they use up the yolk sac, so a breeding group means more mouths competing with the shrimp (our reading).

Other tankmates

Whiptails are slow feeders and easy targets, so TFH recommends docile midwater fish such as tetras, rasboras and danios, says a few corydoras or kuhli loaches are fine if there's enough food, and rules out nippy fish such as tiger barbs, serpae tetras and puffers. Seriously Fish suggests small characins, Apistogramma, corydoras and other quiet loricariids, and TFH warns against pushier bottom-feeders such as loaches and common plecos. See corydoras with shrimp and kuhli loaches with shrimp.

Feeding both

Seriously Fish says whiptails accept sinking dried foods, vegetables such as blanched spinach, courgette and kale, and live and frozen foods such as bloodworm and Daphnia. TFH uses catfish pellets and algae wafers as staples and warns that whiptails are not strong competitors. Shrimp will swarm the same wafers, so drop food in two places, one of them near the catfish's cave, and check the catfish gets some (our suggestion). See best shrimp food.

How to add whiptail catfish to a shrimp tank

• Check the tank size first. A small group needs about a 30-inch tank (Seriously Fish).
• Shrimp first. Practical Fishkeeping suggests letting the shrimp colony build up before adding fish.
• Acclimate slowly. See how to drip acclimate.
• Check the catfish is eating for the first few weeks; a hungry shrimp colony can beat it to food.
• Quarantine the fish separately. Practical Fishkeeping says many fish medications are not safe for invertebrates. If fish get sick, ask a fish veterinarian or an experienced store about treatment that won't harm the shrimp. See how to quarantine and is copper toxic to shrimp.

Common mistakes

• Putting a fish that grows to 4 to 6 inches in a nano tank.
• Sharp gravel or colored sands; TFH prefers smooth silica sand.
• Pairing them with nippy or pushy fish that take their food.
• Buying a twig catfish or royal whiptail by mistake; TFH says those are more demanding and Sturisoma can reach about 12 inches.

Track it

Log temperature, pH, GH and TDS on the free Water Parameter Log printable so you can keep the tank in the range both species share.

Frequently asked questions

Will whiptail catfish eat cherry shrimp?

No. Practical Fishkeeping's Neale Monks says whiptail catfish pose no threat at all to shrimp, and in TFH he writes that they won't harm even the smallest tankmates. We rate them a low risk.

How big do whiptail catfish get?

About 4 inches for the common whiptail: 110 mm standard length for R. parva per Seriously Fish, or 3 to 4 inches per TFH. R. lanceolata can reach about 6 inches (TFH).

What size tank does a whiptail catfish need?

Seriously Fish suggests 30 by 12 by 12 inches, about 18 US gallons, for a small group of R. parva; TFH allows 3 to 4 gallons per fish.

What water do whiptail catfish need?

TFH says most species do well at 72 to 79 °F, pH 6.0 to 7.5 and hardness 3 to 15; Seriously Fish lists 68 to 77 °F for R. parva. With cherry shrimp, aim for about 72 to 77 °F, pH 6.8 to 7.5, GH 4 to 8 and KH 2 to 5 in our reading.

Do whiptail catfish eat algae?

Not mainly. Seriously Fish says they are omnivores that eat aufwuchs and small crustaceans in the wild; TFH says the small Rineloricaria whiptails are carnivores of worms and insect larvae rather than algae eaters.

Do whiptail catfish need sand?

Sand suits them best. Practical Fishkeeping says sand is a good choice because they spend most of their time on the substrate, and TFH recommends smooth, lime-free silica sand.

Sources: Practical Fishkeeping, can I safely add some shrimp? (Neale Monks: whiptail catfish and ricefish pose no threat at all; whiptails are strictly sand-sifters with a taste for worms); Neale Monks, TFH Magazine, The weird and wonderful world of whiptails (Neale Monks; won't harm even the smallest tankmates such as livebearer fry; predatory instincts directed at worms and insect larvae; Loricariini vs Harttiini; Rineloricaria or Hemiloricaria, R. parva, R. sp. L010A; hardness 3–15, pH 6.0–7.5, 72–79 °F; smooth lime-free silica sand; low plants with open areas; catfish pellets, algae wafers, frozen foods; slow feeders; docile midwater fish, a few corydoras or kuhli loaches; avoid tiger barbs, serpae tetras, puffers, loaches and common plecos; gregarious; gregarious, mild nest territoriality; bred like bristlenose; fry eat algae and fine foods; R. parva 3 to 4 in, R. lanceolata about 6 in; 3 to 4 gallons per fish; Farlowella and Sturisoma more demanding, Sturisoma up to about 12 in); Seriously Fish, Rineloricaria parva (whiptail catfish) (Brazil, Paraguay, Argentina; leaf litter over sand; 110 mm SL; small group in 75 × 30 × 30 cm, about 68 L, 18 US gal; 20–25 °C, pH 6.0–7.5, 2–15 dGH; does not do well at higher temperatures; sand, oak or beech leaves, branches, caves or PVC pipe; not very bright light; aufwuchs and small crustaceans in nature; omnivorous in the aquarium; one of the most peaceful catfish; small characins, Apistogramma, Corydoras, quiet loricariids; avoid vigorous or aggressive fish; not territorial unless spawning; best in a small group); Seriously Fish, Rineloricaria lanceolata (whiptail catfish) (Peru and Brazil; 95 mm SL; a pair in 45 × 37.5 × 30 cm, 53 L, larger for a group; 25–28 °C, pH 6.0–8.0, 5–20 dGH; same care and temperament); Practical Fishkeeping, Whiptail catfish: fab beyond drab (whiptails seldom sold under correct names; common whiptails 10–15 cm; spend most of their time on the substrate, sand a good choice; armor makes them inflexible, need room to maneuver; plant friendly; breeding males develop bristles on rostrum, cheeks, sometimes pectoral fins); Aquarium Co-Op, Cherry shrimp tank mates (moss and plants for baby shrimp); Practical Fishkeeping, What can I keep with shrimp? (let shrimp numbers build first; many medications unsafe for invertebrates); The Shrimp Farm, Red rili shrimp tank set-up and care (cherry-type range 65–80 °F, pH 6.8–8.0, GH 4–8, KH 2–5). Risk rating, tank-size advice and the shared water range are our reading of these sources.