Corydoras similis, commonly known as the "Dwarf Cory" or "Similis Cory," is a small and peaceful species of catfish that is popular in the aquarium hobby. Here is some basic information about Corydoras similis:

1. Size: Adult Corydoras similis typically reach a size of around 2.5 centimeters (1 inch).

2. Appearance: They have a typical Corydoras body shape, with a flattened appearance and an arched back. They are often recognized by their pale yellow to beige coloration, and they may have a dark stripe along their bodies. Like other Corydoras species, they have barbels around their mouths.

3. Behavior: Corydoras similis are social and prefer to be kept in groups. Keeping them in groups of at least five individuals is recommended, as they thrive in the company of their own kind. They are peaceful and make excellent community tank inhabitants.

4. Habitat: In the wild, Corydoras similis is found in slow-moving rivers and tributaries in South America, particularly in Brazil and Peru. They prefer well-oxygenated water and soft substrate.

5. Tank Requirements:

   • Tank Size: A tank of at least 10 gallons is suitable for a small group of Corydoras similis.
   • Water Parameters: They prefer slightly acidic to neutral water conditions with a pH range of 6.0 to 7.5. Keep the water temperature between 72°F to 78°F (22°C to 26°C).
   • Substrate: Provide a soft substrate like sand or fine gravel to prevent damage to their delicate barbels.

6. Diet: Corydoras similis are omnivores. They will eat a variety of foods, including high-quality sinking pellets, flakes, and frozen or live foods such as bloodworms and brine shrimp. A well-balanced diet is essential for their health.

7. Tank Decor: Provide hiding spots and plants in the aquarium, as well as open areas for them to explore. They appreciate having places to rest and retreat.

8. Compatibility: Corydoras similis is compatible with other peaceful fish species that share similar water parameter requirements. Avoid keeping them with aggressive or larger tankmates that may intimidate or harm them.

Remember, proper care and attention to water quality are crucial for the well-being of Corydoras similis. Regular water changes and a well-maintained aquarium will contribute to their health and longevity.