Pigmy Cory

Pigmy Cory (Corydoras Pygmaeus)

The Pigmy Cory, also known as Pygmy Corydoras, Dwarf Corydoras, Dwarf Catfish, Tail Spot Pygmy Catfish, or Micro Catfish. They are a small, peaceful species native to the Madeira River basin in South America. This species is characterized by its slender, pale silver-cream body adorned with a strong black lateral band that extends from its nose and barbels to the caudal peduncle. The Pygmy Cory is a small species, reaching an adult size of just 1 inch, making it an ideal choice for nano-aquariums and small community tanks.

The Pygmy Cory is a peaceful, small species that is ideally suited to smaller softwater aquariums. Due to their small size, they may not be suitable for general community aquariums as larger tankmates can intimidate or prey upon them. They are perfect for mature, densely planted nano tanks.

Unlike other Corydoras catfish, Pygmy Cories spend significant time hovering in midwater. They should always be kept in large groups of at least 10, as they enjoy the company of their own kind. This social behavior makes them feel secure and encourages more active behavior.

They are known to 'blink' their eyes, which amazes onlookers as they can tilt their eyes down to examine the nearby substrate. Despite their docile nature, Pygmy Corys are equipped with sharp barbs under each eye, one in the adipose fin, and a large one in the front of their dorsal fin. These barbs serve as a defense mechanism, protecting them from being swallowed by larger fish.

Potential tankmates could include small characins such as Ember Tetras, micro Rasboras (Boraras spp.), or small ornamental shrimps such as Red Crystals or Cherries.

In terms of diet, the Pygmy Cory is an opportunistic feeder, primarily active at night. They will eat most food that sinks to the bottom of the tank, including sinking algae pellets, flake food, and other sinking foods like catfish pellets. They also have a carnivorous side, enjoying foods such as bloodworms, brine shrimp, and daphnia.

For their habitat, the Pygmy Cory thrives in well-oxygenated water with a moderate flow, mirroring their natural riverbed habitats. They favor a soft sandy substrate where they can safely forage for food without damaging their delicate barbels and underbelly, which could otherwise lead to infection and other health complications. The aquarium should be furnished with ample hiding spots, including driftwood, rocks, and caves, along with live plants that offer shade and relief from light. Floating plants can provide subdued lighting, creating an ideal environment for these bottom-dwelling fish.

Additionally, Pygmy Corys are sensitive to salt, as with other scaleless fish; adding salt to the tank will cause them harm.

Regarding their water parameters and aquarium size, the minimum recommended aquarium size is 10 gallons for a school of 6 Pygmy Cory catfish. A community aquarium should be at least 20 gallons plus 1 gallon for every extra 1 inch of fish. The ideal pH range is between 6.0-7.5, and the hardness should be within 6-10 dGH. The temperature should be maintained between 72-79°F (22-26°C).

As with all tropical fish, Corydoras need consistent water parameters. Sudden or inconsistent swings in pH, temperature, and dGH readings can result in stress and health issues.