Pygmy Corydoras (Corydoras pygmaeus)
Pygmy Corydoras are tiny, armored catfish, about 1 inch (2.5 cm) long, known for their silver bodies, a distinctive black horizontal stripe from snout to tail, and peaceful, social, schooling behavior. Unlike most other Corydoras, they spend a significant amount of time swimming in the water column rather than just on the substrate, making them active additions to nano and planted aquariums. They require a large group (6+), soft sand or gravel substrate, and thrive in well-planted tanks with clean, soft water.
| Key Features | Details |
|---|---|
| Size | 1 inch (2.5 cm) |
| Color Pattern | Silver body with black horizontal stripe from snout to tail |
| Behavior | Peaceful, social, schooling fish (requires group of 6+) |
| Substrate Preference | Soft sand or gravel |
| Water Conditions | Soft, clean water with well-planted tank |
FAQ
What is the ideal group size for Pygmy Corydoras?
Pygmy Corydoras require a group of at least 6 to thrive due to their social and schooling behavior.
Do Pygmy Corydoras prefer to stay on the substrate or swim in the water column?
They spend a significant amount of time swimming in the water column rather than staying on the substrate, making them more active and visible in the tank.
What type of substrate do they prefer?
They prefer soft sand or gravel substrates to avoid injury from sharp edges.
Warren Peters –
These little catfish are a joy to watch. They swim actively in the middle of the tank and don’t bother other fish. I kept them in a 10-gallon planted tank with soft sand and they’ve been thriving for over six months. The black stripe is very noticeable and they seem very calm and social.
Sue Howard –
I bought a group of six and they’ve settled in well. They don’t hide much and are always moving around. The tank needs to be well-planted and have soft water, which I’ve maintained. They’re a great addition to a community tank.
Rachel Bower –
The Pygmy Corydoras are small but lively. They swim in the water column and don’t dig or disturb the substrate. I’ve kept them with neon tetras and they coexist peacefully. The black stripe is a nice visual feature.