Ceros tetra - Moenkhausia ceros

Scientific name: Moenkhausia ceros

Common name: Ceros tetra

Family: Characidae

Usual size in fish tanks: 5 - 6 cm (1.97 - 2.36 inch)

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Recommended pH range for the species: 6.5 - 7.4

Recommended water hardness (dGH): 5 - 30°N (89.29 - 535.71ppm)

0°C 32°F30°C 86°F

Recommended temperature: 23 - 28 °C (73.4 - 82.4°F)

The way how these fish reproduce: Spawning

Where the species comes from: South America

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Top levels

Short Description

The Ceros Tetra (Moenkhausia ceros) is a peaceful and vibrant freshwater fish originating from the rivers of South America. Known for its shimmering scales and active swimming behavior, this species thrives in community tanks with other non-aggressive fish. Ideal for beginners and experienced aquarists alike, Ceros Tetras require soft, acidic water and a well-planted environment to feel secure. Keeping them in groups of six or more encourages their natural schooling behavior and reduces stress.

Origin

Native to the waterways of Peru, Moenkhausia ceros inhabits slow-moving rivers and streams with dense vegetation and sandy substrates. These areas are rich in organic matter, which contributes to the slightly acidic water conditions they prefer. The biodiversity of Peru’s river systems makes them a hotspot for unique and colorful fish species like the Ceros Tetra.

Tank Requirements

A tank of at least 60 liters (15 gallons) is recommended for Ceros Tetras. Maintain water temperatures between 23-28°C (73.4-82.4°F), a pH range of 6.5-7.4, and water hardness of 5-30°N (89.29-535.71 ppm). Provide plenty of plants and hiding spots to create a sense of security for this shy species. Use a fine, sandy substrate and moderate lighting to mimic their natural habitat. Ensure good filtration and regular water changes to keep the water clean and stable.

Food and Feeding

Ceros Tetras are omnivorous and readily accept most foods. Use high-quality flakes or small pellets as their staple diet. To enhance their coloration, offer treats such as bloodworms, brine shrimp, or daphnia a few times a week. Feeding small portions twice daily ensures optimal health and activity levels.

Compatibility

As peaceful schooling fish, Ceros Tetras are well-suited for community tanks. They pair well with other small, non-aggressive species such as rasboras, Corydoras catfish, and dwarf gouramis. Avoid housing them with large or predatory fish that may intimidate or harm them. Keeping them in groups of at least six promotes natural behaviors and minimizes stress.

Sexing

Females are generally plumper than males, especially when carrying eggs. Males may display slightly brighter coloration during breeding periods.

Breeding

Breeding Ceros Tetras requires a separate tank with soft, acidic water. Provide fine-leaved plants or a spawning mop for the eggs. The fish scatter their eggs around the substrate, and it’s important to remove the parents after spawning to prevent them from eating the eggs. The eggs hatch within 24-48 hours, and the fry become free-swimming a few days later. Feed the fry newly hatched brine shrimp or infusoria for their initial meals.

Lifespan

With proper care, Moenkhausia ceros can live for 2-3 years. Stable water conditions, a varied diet, and a stress-free environment are essential to maximize their lifespan.