Pygmy Corydoras (Corydoras pygmaeus) Peaceful Nano Bottom Dweller
Pygmy Corydoras (Corydoras pygmaeus)
The Pygmy Corydoras (Corydoras pygmaeus) is one of the smallest and most popular freshwater catfish in the aquarium hobby. Known for their peaceful nature, tiny size, and unique midwater schooling behavior, Pygmy Corys are perfect for nano aquariums, planted tanks, and community setups.
Unlike most Corydoras species that spend nearly all their time on the substrate, Pygmy Corydoras frequently shoal together throughout the middle of the aquarium, creating constant movement and activity. Their gentle temperament makes them excellent companions for shrimp, nano fish, and other peaceful community species.
Quick Facts
- Scientific Name: Corydoras pygmaeus
- Common Name: Pygmy Corydoras, Pygmy Cory Catfish
- Adult Size: Up to 1.2 inches
- Temperament: Peaceful
- Care Level: Easy
- Diet: Omnivore
- Lifespan: 3–5 years
- Minimum Tank Size: 10 gallons
- Water Temperature: 72–79°F
- pH Range: 6.5–7.5
- Swimming Level: Bottom to Midwater
- Schooling Fish: Yes
Why Choose Pygmy Corydoras?
✔ Perfect nano aquarium fish
✔ Unique midwater schooling behavior
✔ Peaceful and community safe
✔ Excellent shrimp tank companion
✔ Great for planted aquariums
✔ Beginner friendly and easy to care for
Aquarium Setup
Pygmy Corydoras thrive in mature aquariums with gentle water flow, fine substrate, and plenty of plant cover. Fine sand is ideal because it helps protect their delicate barbels while allowing natural foraging behavior.
Recommended setup:
- 10 gallons minimum
- Fine sand substrate
- Live plants
- Driftwood and leaf litter
- Gentle filtration
- Stable water conditions
- School of 6 or more fish
Heavily planted aquariums help them feel secure and encourage natural behavior.
Diet & Feeding
Pygmy Corydoras are omnivores and readily accept:
- Sinking micro pellets
- Nano pellets
- Crushed flakes
- Frozen baby brine shrimp
- Daphnia
- Cyclops
- Live foods
- Small sinking wafers
Feed a varied diet to maintain healthy growth and coloration.
Tank Mates
Pygmy Corydoras do well with:
- Ember Tetras
- Chili Rasboras
- Neon Green Rasboras
- Celestial Pearl Danios
- Endlers
- Honey Gouramis
- Otocinclus
- Neocaridina Shrimp
- Mystery Snails
Avoid large or aggressive fish that may intimidate or eat them.
Schooling Behavior
Pygmy Corydoras are highly social and should always be kept in groups.
Recommended group sizes:
- Minimum: 6 fish
- Ideal: 10–20+ fish
Larger groups display more natural shoaling behavior and increased confidence.
Frequently Asked Questions
How many Pygmy Corydoras should be kept together?
A minimum of six is recommended, though larger groups are preferred.
Do Pygmy Corydoras stay on the bottom?
Unlike most Corydoras species, Pygmy Corys frequently school throughout the middle of the aquarium.
Are Pygmy Corydoras good for nano tanks?
Yes. Their tiny size makes them one of the best catfish for nano aquariums.
Are they safe with shrimp?
Absolutely. Pygmy Corydoras are peaceful and shrimp-safe.
Do they need sand?
Fine sand is highly recommended because it protects their barbels and encourages natural feeding behavior.
Available at Tropical Treasures Wyo
Shop healthy Pygmy Corydoras at Tropical Treasures Wyo in Cheyenne, Wyoming. These peaceful nano catfish are perfect for planted aquariums, shrimp tanks, and freshwater community aquariums.
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