Similis Corydoras

About the Similis Corydoras

The Similis Corydoras is a beautiful and relatively uncommon South American catfish, admired for its delicate pearly body, intricate black spotting, and subtle violet-blue iridescence that becomes especially noticeable under quality aquarium lighting. Native to the upper Amazon Basin in Brazil, this peaceful species is highly regarded by Corydoras enthusiasts for its elegant appearance and calm, social nature.

Often mistaken for other spotted Corydoras species, Corydoras similis is distinguished by its fine pepper-like markings across the body and the attractive iridescent sheen that develops as the fish matures. Like all Corydoras, they spend their day sifting through the substrate with their sensitive barbels, searching for small invertebrates and food while constantly interacting with their school.

Similis Corydoras thrive in mature planted aquariums with fine sand, driftwood, leaf litter, and gentle water flow. They should always be kept in groups of at least six, where they display natural shoaling behaviour and become significantly more active and confident. Their peaceful temperament makes them ideal companions for Cardinal Tetras, Rummy Nose Tetras, Harlequin Rasboras, Rams, Apistogramma, Pencilfish, Gouramis, and other peaceful community fish.

A varied diet of quality sinking pellets, Corydoras wafers, frozen bloodworms, blackworms, baby brine shrimp, daphnia, and other live or frozen foods will keep them healthy while enhancing their natural iridescence.

Peaceful, hardy, and full of personality, the Similis Corydoras is an outstanding addition to planted aquariums and Amazon biotope displays.

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Quick Care Guide

Scientific Name

Corydoras similis

Common Name

Similis Corydoras

Origin

Upper Amazon Basin, Brazil

Adult Size

5–6 cm

Temperament

Peaceful

Diet

Omnivore

Minimum Tank Size

75 Litres

Temperature

22–27°C

pH

6.0–7.5

Water Hardness

2–12 dGH

Difficulty

Beginner

Lifespan

8–10 Years

Suitable For

Planted aquariums, Amazon biotopes, and peaceful community tanks

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Frequently Asked Questions

How many Similis Corydoras should I keep?

Similis Corydoras are highly social and should always be kept in groups of at least 6, although groups of 8–10 or more encourage the most natural behaviour.

Are Similis Corydoras peaceful?

Yes. They are extremely peaceful and are excellent tank mates for tetras, rasboras, dwarf cichlids, gouramis, and other non-aggressive community fish.

What do Similis Corydoras eat?

They thrive on quality sinking pellets, Corydoras wafers, frozen bloodworms, blackworms, baby brine shrimp, daphnia, and other live or frozen foods.

Do Similis Corydoras need sand?

Yes. Fine sand is highly recommended as it allows them to forage naturally while protecting their delicate barbels.

Can Similis Corydoras live with shrimp?

Yes. They are completely peaceful with adult Cherry Shrimp, Amano Shrimp, and other dwarf shrimp species. Very small shrimplets may occasionally be eaten but are generally ignored.

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Common Mistakes

Keeping them in small groups

Similis Corydoras become shy and inactive when kept in groups smaller than six.

Using coarse gravel

Sharp gravel can damage their sensitive barbels. Fine sand is the ideal substrate.

Assuming they survive on leftovers

They require dedicated feeding with quality sinking foods and should not rely solely on uneaten food from other fish.

Poor water quality

Clean, well-filtered water and regular maintenance are essential for maintaining healthy Corydoras.

Housing them with aggressive fish

Choose peaceful community species that won't harass or outcompete these gentle bottom dwellers.

About the Similis Corydoras

The Similis Corydoras is a beautiful and relatively uncommon South American catfish, admired for its delicate pearly body, intricate black spotting, and subtle violet-blue iridescence that becomes especially noticeable under quality aquarium lighting. Native to the upper Amazon Basin in Brazil, this peaceful species is highly regarded by Corydoras enthusiasts for its elegant appearance and calm, social nature.

Often mistaken for other spotted Corydoras species, Corydoras similis is distinguished by its fine pepper-like markings across the body and the attractive iridescent sheen that develops as the fish matures. Like all Corydoras, they spend their day sifting through the substrate with their sensitive barbels, searching for small invertebrates and food while constantly interacting with their school.

Similis Corydoras thrive in mature planted aquariums with fine sand, driftwood, leaf litter, and gentle water flow. They should always be kept in groups of at least six, where they display natural shoaling behaviour and become significantly more active and confident. Their peaceful temperament makes them ideal companions for Cardinal Tetras, Rummy Nose Tetras, Harlequin Rasboras, Rams, Apistogramma, Pencilfish, Gouramis, and other peaceful community fish.

A varied diet of quality sinking pellets, Corydoras wafers, frozen bloodworms, blackworms, baby brine shrimp, daphnia, and other live or frozen foods will keep them healthy while enhancing their natural iridescence.

Peaceful, hardy, and full of personality, the Similis Corydoras is an outstanding addition to planted aquariums and Amazon biotope displays.

---

Quick Care Guide

Scientific Name

Corydoras similis

Common Name

Similis Corydoras

Origin

Upper Amazon Basin, Brazil

Adult Size

5–6 cm

Temperament

Peaceful

Diet

Omnivore

Minimum Tank Size

75 Litres

Temperature

22–27°C

pH

6.0–7.5

Water Hardness

2–12 dGH

Difficulty

Beginner

Lifespan

8–10 Years

Suitable For

Planted aquariums, Amazon biotopes, and peaceful community tanks

---

Frequently Asked Questions

How many Similis Corydoras should I keep?

Similis Corydoras are highly social and should always be kept in groups of at least 6, although groups of 8–10 or more encourage the most natural behaviour.

Are Similis Corydoras peaceful?

Yes. They are extremely peaceful and are excellent tank mates for tetras, rasboras, dwarf cichlids, gouramis, and other non-aggressive community fish.

What do Similis Corydoras eat?

They thrive on quality sinking pellets, Corydoras wafers, frozen bloodworms, blackworms, baby brine shrimp, daphnia, and other live or frozen foods.

Do Similis Corydoras need sand?

Yes. Fine sand is highly recommended as it allows them to forage naturally while protecting their delicate barbels.

Can Similis Corydoras live with shrimp?

Yes. They are completely peaceful with adult Cherry Shrimp, Amano Shrimp, and other dwarf shrimp species. Very small shrimplets may occasionally be eaten but are generally ignored.

---

Common Mistakes

Keeping them in small groups

Similis Corydoras become shy and inactive when kept in groups smaller than six.

Using coarse gravel

Sharp gravel can damage their sensitive barbels. Fine sand is the ideal substrate.

Assuming they survive on leftovers

They require dedicated feeding with quality sinking foods and should not rely solely on uneaten food from other fish.

Poor water quality

Clean, well-filtered water and regular maintenance are essential for maintaining healthy Corydoras.

Housing them with aggressive fish

Choose peaceful community species that won't harass or outcompete these gentle bottom dwellers.