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FishmediumFreshwater

Striped Headstander

Anostomus anostomus

📍 South America

The Striped Headstander is a striking, torpedo-shaped characin from South America known for its bold horizontal black and gold stripes and its distinctive head-down swimming posture. It is a hardy and active fish that makes a visually impressive addition to larger community aquariums. However, its semi-aggressive nature and tendency to nip fins means tankmate selection requires careful consideration.

Size7"
Min Tank55g
semi-aggressive
Zonemiddle

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Care Guide

Diet

The Striped Headstander is primarily herbivorous and should be fed a diet rich in plant-based foods such as blanched spinach, zucchini, spirulina wafers, and algae-based flake or pellet foods. It will also accept small meaty foods like bloodworms or brine shrimp as occasional treats. Feed 2-3 times daily in small amounts, and be aware it will graze on soft-leaved aquarium plants.

Behavior

This species adopts a characteristic head-down angle when swimming and foraging, which is a normal and fascinating behavior to observe. It is an active, fast-moving fish that can be territorial and nippy toward similarly shaped or slower-moving tankmates, particularly those with long fins. It is best kept singly or in groups of 5 or more to distribute aggression, and it appreciates a well-decorated tank with driftwood, rocks, and robust plants.

Breeding

Breeding the Striped Headstander in captivity is extremely rare and has seldom been achieved in home aquariums. They are egg scatterers in the wild, spawning during seasonal flooding events in large river systems. Replicating these conditions, including significant water volume changes and specific temperature and pH triggers, would be required for any breeding attempt.

Common Diseases

Ich (White Spot Disease)

Symptoms

Small white spots resembling grains of salt covering the body and fins, flashing against objects, lethargy

Treatment

Raise water temperature gradually to 28-30°C and treat with an ich-specific medication such as copper-based treatments or malachite green; perform regular water changes

Fin Rot

Symptoms

Fraying, discoloration, or deterioration of fins, often with a white or red edge

Treatment

Improve water quality with frequent water changes, remove any aggressive tankmates, and treat with antibacterial medication such as kanamycin or erythromycin

Hole-in-the-Head Disease (HITH)

Symptoms

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

Treatment

Improve diet with varied nutrition and vitamin supplements, perform large water changes, and treat with metronidazole if bacterial infection is suspected

Velvet (Oodinium)

Symptoms

Fine gold or rust-colored dust on the skin, rapid gill movement, flashing, lethargy

Treatment

Dim tank lighting, treat with copper-based medication or acriflavine, and raise temperature slightly; quarantine affected fish

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Quick Facts

diet
Herbivore/omnivore – algae, plant matter, vegetables, and some meaty foods
lifespan
5-10 years
max size
18 cm (7 in)
tank size
55 gallons minimum
temperament
semi-aggressive

Water it likes

ph
5.5-7.5
ammonia
0 ppm
nitrate
<20 ppm
hardness
2-15 dGH
temperature
72–82°F (22–28°C)

Stats

Community tips0
Kept by0 hobbyists