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FishbeginnerFreshwater

Whiptail Catfish

Rineloricaria lanceolata

AnimaliaChordataActinopterygiiLoricariidae

📍 Amazon Basin, South America

Ask Finn

A long, slender catfish with a whip-like tail extension and intricate patterning. An excellent sand-sifter that keeps substrate clean. Peaceful and unobtrusive, often resting camouflaged on driftwood or sandy bottoms.

Size5"
Min Tank30g
peaceful
Zonebottom

Care Guide

Diet

Whiptail catfish are primarily algae and biofilm grazers that spend most of their time consuming algae from wood, rocks, and glass surfaces. Supplement their natural grazing with sinking algae wafers, blanched vegetables (zucchini, spinach), and occasional frozen foods like bloodworms 2-3 times weekly. Feed small amounts in the evening when they are most active.

Behavior

These nocturnal bottom-dwellers are peaceful and relatively inactive during the day, preferring to hide among driftwood and plants. They are solitary or found in loose groups in the wild, and males are territorial during breeding season but otherwise non-aggressive. They use their whip-like tail for balance and communication, and are excellent for controlling algae in established tanks.

Breeding

Breeding in captivity is moderately difficult and requires specific conditions including driftwood for egg-laying sites, stable water parameters, and temperatures around 24-26°C. Males guard eggs aggressively and will chase females after spawning. Fry are difficult to raise due to their small size and specific dietary needs, making successful breeding relatively uncommon in home aquaria.

Common Diseases

Ich (White Spot Disease)

Symptoms

White spots on body and fins, rapid breathing, rubbing against surfaces

Treatment

Raise temperature to 28-29°C gradually, perform 25% water changes daily, use aquarium salt (1 teaspoon per 5 gallons) or ich-specific medication for 7-10 days

Fin Rot

Symptoms

Frayed or deteriorating fins, discoloration at fin edges, lethargy

Treatment

Improve water quality with frequent partial water changes, remove sharp decorations, treat with antibacterial medication if severe; ensure adequate hiding spots to reduce stress

Bacterial Infection

Symptoms

Open sores, cloudy eyes, loss of appetite, torn fins

Treatment

Perform 50% water change immediately, maintain pristine water conditions, treat with broad-spectrum antibiotic medication; isolate if possible to prevent spread

Parasitic Infection

Symptoms

Excessive scratching, weight loss, visible parasites on body, clamped fins

Treatment

Quarantine affected fish, treat with anti-parasitic medication, maintain water temperature at 26°C, perform daily 25% water changes during treatment

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Quick Facts

diet
Omnivore – sinking pellets, algae wafers, frozen bloodworms
lifespan
5–10 years
max size
12 cm (5 in)
tank size
20 gallons minimum
temperament
Peaceful

Water it likes

ph
6.0–7.5
ammonia
0 ppm
nitrate
<20 ppm
hardness
2–15 dGH
temperature
72–79°F (22–26°C)

Stats

Community tips0
Kept by0 hobbyists