Pygmy Corydoras (Corydoras pygmaeus)

Tiny, active, and absolutely delightful — the Pygmy Corydoras (Corydoras pygmaeus) is one of the smallest and most charming Corydoras species in the freshwater hobby. Unlike most Corydoras that stay near the bottom, Pygmy Corys are mid-water schoolers that dart and hover in open water in tight groups, creating a mesmerizing, constantly moving display that is unlike any other Corydoras species.

Overview

Appearance

The Pygmy Cory has a slender, elongated body with a silver base colour and a bold black lateral stripe running from the snout to the base of the tail. A second, thinner stripe runs along the lower body. Their tiny size, active swimming style, and tight schooling behaviour make a group of Pygmy Corys one of the most dynamic and entertaining sights in any nano or planted aquarium.

Water Parameters & Tank Setup

• Temperature: 72 – 79°F (22 – 26°C)
• pH: 6.0 – 7.5
• General Hardness (GH): 2 – 12 dGH
• Tank Size: Minimum 10 gallons for a group of 8+
• Substrate: Soft sand or fine gravel
• Plants & Decor: Planted tanks with open swimming space; floating plants appreciated

Diet & Feeding

• Staple: Micro sinking pellets and nano fish flakes
• Treats: Baby brine shrimp, micro worms, daphnia, and small bloodworms

Feed small amounts 2–3 times daily.

Compatibility & Tank Mates

Best kept in groups of 10 or more. Perfect for nano community tanks. Good tank mates include Chili Rasboras, Ember Tetras, Celestial Pearl Danios, and Neocaridina shrimp. Avoid any fish large enough to eat them.

Breeding

Pygmy Corys breed readily in well-maintained aquariums. Females deposit eggs on plant leaves and glass. Eggs hatch in 3–5 days and fry can be fed infusoria and baby brine shrimp.

The Pygmy Corydoras is a nano aquarium treasure — tiny, active, and endlessly entertaining. Keep a large group and enjoy their lively mid-water schooling behaviour every day.