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Ornate Pimelodus

Pimelodus ornatus

📍 South America

The Ornate Pimelodus is a striking, large-growing South American catfish known for its bold black and white spotted patterning. It is an active, fast-moving species that is best suited for spacious aquariums with robust tankmates. Though visually impressive, it requires experienced care due to its size, speed, and predatory nature toward smaller fish.

Size14"
Min Tank180g
semi-aggressive
Zonebottom

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Care Guide

Diet

The Ornate Pimelodus is a carnivore that thrives on high-protein foods such as sinking carnivore pellets, frozen bloodworms, krill, earthworms, and chopped shrimp. It is an opportunistic predator and will consume any fish small enough to fit in its mouth. Feed once or twice daily, offering only what can be consumed within a few minutes to maintain water quality.

Behavior

This species is highly active, particularly at dusk and dawn, and will patrol the lower and middle regions of the tank with impressive speed. It can be kept singly or in groups, though groups require very large tanks to reduce territorial skirmishes. It is generally peaceful with similarly sized tankmates but will readily eat smaller fish and invertebrates.

Breeding

Breeding Pimelodus ornatus in captivity is extremely rare and has not been reliably documented in home aquaria. In the wild, they are believed to be open-water egg scatterers that migrate to spawn during seasonal floods. Hormonal injection techniques used in commercial fish farming would likely be required to induce spawning.

Common Diseases

Ich (White Spot Disease)

Symptoms

Small white spots resembling grains of salt on body and fins, flashing, lethargy

Treatment

Raise temperature gradually to 28-30 C, treat with ich-specific medication; use half-dose with caution as catfish are sensitive to medications

Columnaris

Symptoms

White or grayish patches on skin, frayed fins, ulcerations, rapid gill movement

Treatment

Broad-spectrum antibacterial treatment such as kanamycin or nitrofurazone; improve water quality and reduce stress

Hole-in-the-Head Disease

Symptoms

Pitting or erosion on the head and lateral line, loss of appetite, lethargy

Treatment

Improve diet with varied nutrition, perform frequent water changes, treat with metronidazole if parasitic involvement is suspected

Anchor Worm / External Parasites

Symptoms

Visible thread-like parasites attached to skin, redness, irritation, flashing

Treatment

Manual removal with tweezers followed by topical antiseptic; treat tank with diluted potassium permanganate or appropriate antiparasitic medication

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Quick Facts

diet
Carnivore – sinking pellets, frozen meaty foods, earthworms, shrimp
lifespan
10-15 years
max size
36 cm (14 in)
tank size
180 gallons minimum
temperament
semi-aggressive

Water it likes

ph
6.0-7.5
ammonia
0 ppm
nitrate
<20 ppm
hardness
2-15 dGH
temperature
72–82°F (22–28°C)

Stats

Community tips0
Kept by0 hobbyists