Species description

Care, breeding and tankmates

Fish profile

Temperament

Peaceful

The temperament of Corydoras similis is exceptionally peaceful and highly social in nature. They must be kept in groups of at least six individuals to thrive. In proper schools, they are confident and constantly active across the bottom.

Diet

Omnivore

The diet of Corydoras similis primarily features benthic organisms and small detritus. In captivity, they eagerly eat sinking pellets and high-quality bottom-feeder wafers. Live foods like bloodworms and daphnia should be offered for optimal health.

Sex ratio

Group

A specific sex ratio is unnecessary for the general community keeping of Corydoras similis. For dedicated breeding, a ratio of two males per female is optimal. Females are visibly rounder and broader, while males are slender.

Feeding frequency

Twice daily

It is recommended to feed Corydoras similis one or two times daily in moderate portions. Ensure the food reaches the substrate before mid-water fish consume it all. Feeding just before lights out helps them forage peacefully without stress.

Bioload

Low

The bioload of Corydoras similis is relatively low compared to larger tank mates. Since they are schooling fish, their combined waste can accumulate over time. Consistent filtration and weekly water changes are necessary for maintaining clean water.

Flow

Strong

Corydoras similis prefers a moderate water flow that replicates gentle Amazonian streams. This circulation thoroughly oxygenates the water and prevents detritus accumulation. Calm resting zones should also be provided for relaxation.

Jump risk

No

Reproduction

Oviparous

Breeding Corydoras similis in an aquarium is highly achievable with proper conditioning. Spawning is typically triggered by a large, slightly cooler water change. The female then deposits adhesive eggs on aquarium glass or broad plant leaves.

Compatibility & tankmates

Peaceful

In terms of compatibility, Corydoras similis is extremely peaceful and ideal for community setups. They coexist perfectly with small tetras, rasboras, and dwarf cichlids. Large, aggressive bottom-dwellers must be avoided to prevent undue competition.

Tank level

Bottom

As obligate bottom-dwellers, Corydoras similis spends the vast majority of its time on the substrate. They constantly search for food by sifting fine sand with their sensitive barbels. They occasionally dart to the surface to gulp atmospheric air.