Similis Cory Catfish (Corydoras similis)

The Similis Cory Catfish, also known as the Smudge Spot or Violet Cory, is an uncommon Corydoras species prized for the deep violet tones it develops as it matures. Native to Brazil, this peaceful and animated schooling fish is highly sought after for nano, community, and planted aquariums. When kept in groups, it displays beautiful synchronized movement and constant bottom-level activity.

A classic scavenger, Corydoras similis prefers sand or smooth gravel to protect its delicate barbels. Easy to care for and adaptable, it readily accepts dry, frozen, and live foods. While generally shrimp safe, very small dwarf shrimp may be at risk.

What We Like About This Fish

• Very peaceful and hardy addition to almost any aquarium
• Compatible with most adult dwarf shrimp and peaceful invertebrates
• Thrives in schools in well-planted aquaria
• Distinctive violet coloration and attractive group behavior

Recommended Tank Parameters

• Temperature: 20°–27°C (68°–81°F)
• pH: 5.5 – 7.2
• KH: 0 – 15 dKH
• Minimum Tank Size: 15 gallons (for a school of 6)

Care Guidelines

• Diet: High-quality sinking dry foods plus live and frozen meaty foods (variety is essential)
• Social Behavior: Peaceful — must be kept in groups of 6 or more
• Origin: Tank-bred (species native to Brazil)
• Average Adult Size: ~6 cm (2.4 inches)
• Average Purchase Size: ~2.5 cm (1 inch)
• Shrimp Safe: YES with adult shrimp (very small shrimp may be preyed upon)