Corydoras similis – 2 to 3 cm

Corydoras similis

Corydoras similis, now also classified under the scientific name Hoplisoma simile, is a small bottom-dwelling fish native to South America, more specifically Brazil.

It is recognised by its pale body covered with numerous small dark spots. A broad, diffuse dark marking towards the base of the caudal fin is one of its distinctive features and helps distinguish it from other spotted Corydoras.

The specimens offered here are approximately 2 to 3 cm.

Adult Size of Corydoras similis

Corydoras similis generally reaches around 5 to 6 cm as an adult.

Adult females are usually larger and have a more robust, rounded body than males.

A Sociable Fish to Keep in a Group

Corydoras similis is a sociable, shoaling fish and should not be kept alone.

A group of at least 6 individuals is recommended. When sufficient space is available, a larger group encourages the expression of natural social behaviour.

The fish regularly move together and spend much of their time exploring the bottom of the aquarium.

What Size Aquarium Does Corydoras similis Need?

The amount of available floor space is particularly important for this species. An aquarium with a footprint of approximately 45 × 30 cm minimum provides a basis for keeping a small group. A larger aquarium is preferable for a larger group or when keeping them in a community aquarium.

The substrate should be fine and non-abrasive. Fine sand is particularly suitable for the natural behaviour of Corydoras, which use their barbels when searching for food along the bottom.

Plants, roots and shaded areas can be included while maintaining sufficient open areas along the substrate.

Water Parameters

Temperature: 22 to 26 °C
pH: 6 to 8
Water: soft to moderately hard
Nitrite: 0 mg/L

Nitrite should remain undetectable. Clean, stable, properly filtered water and regular aquarium maintenance are important for keeping this species in good condition.

Feeding Corydoras similis

Corydoras similis has an omnivorous diet with a strong animal component.

In the aquarium, it readily accepts sinking pellets and tablets suitable for bottom-dwelling fish. Its diet can be supplemented with Artemia, Daphnia, bloodworms and other suitably sized live or frozen foods.

A varied and appropriately distributed diet helps keep the fish in good condition.

Corydoras similis should not be regarded as a “cleaner fish” expected to survive on leftovers from other fish. It requires a complete diet specifically provided for it.

Behaviour and Compatibility

Corydoras similis is a peaceful and sociable fish. It is well suited to community aquariums with other peaceful species that have compatible temperature and water requirements.

Although it spends most of its time near the bottom, it may regularly swim rapidly to the surface to take in a small amount of air. This is normal behaviour for Corydoras.

Breeding Corydoras similis

Corydoras similis is an egg-laying fish.

During breeding, the male and female may adopt the characteristic “T-position” seen in many Corydoras.

The female then gradually attaches the eggs to various surfaces within the aquarium, including the glass, plant leaves or other suitable surfaces.

The parents provide no parental care and may eat the eggs. For controlled breeding, the eggs or breeding adults can therefore be separated.

Origin of Corydoras similis

Corydoras similis is native to South America, more specifically the Rio Madeira basin in Brazil.

In its natural habitat, the species occurs in small waterways, tributaries and quieter areas where it searches for food along the bottom.

Lifespan

Under suitable aquarium conditions, Corydoras similis can live for approximately 5 to 8 years, with some individuals potentially living longer.

Conservation Status

Corydoras similis, currently classified under the scientific name Hoplisoma simile, is listed as LC – Least Concern on the IUCN Red List.

Never Release Aquarium Fish into the Wild

Aquarium fish must never be released into a river, pond, lake or any other natural environment, in order to protect natural ecosystems and wildlife.

Key Facts About Corydoras similis

• commercial name: Corydoras similis;
• current scientific name: Hoplisoma simile;
• former scientific name: Corydoras similis;
• size offered: 2 to 3 cm;
• adult size: approximately 5 to 6 cm;
• origin: Rio Madeira basin, Brazil;
• peaceful, sociable bottom-dwelling fish;
• group of at least 6 individuals recommended;
• fine, non-abrasive substrate recommended;
• temperature: 22 to 26 °C;
• pH: 6 to 8;
• omnivorous diet with a strong animal component;
• egg-laying reproduction;
• lifespan: approximately 5 to 8 years;
• IUCN status: LC – Least Concern.