Corydoras Dwarf (Corydoras hastats) – Pygmy Corycat
One of the smallest species of Corydoras and an ideal, active schooling fish for the aquarium. This species is a true shoaling fish which aggregates in groups of hundreds to thousands in nature, and unlike most Corydoras will spend a substantial amount of time swimming in the water column rather than on the substrate. They will exhibit this same ‘swarming’ behavior and constant activity if kept in groups of 10 or more. With their small adult size and compatibility with almost any other small fish or invertebrate, they are an extremely popular addition to planted and shrimp tanks.
| Common Name | Pygmy Corycat |
|---|---|
| Scientific Name | Corydoras pygmaeus |
| Origin | Colombia, Brazil, and Peru |
FAQ
What is the ideal group size for Corydoras Dwarf?
The ideal group size is 10 or more, as they are true shoaling fish and exhibit swarming behavior best in larger groups.
Do Corydoras Dwarf spend time swimming in the water column?
Yes, unlike many other Corydoras species, they spend a substantial amount of time swimming in the water column rather than on the substrate.
Are they compatible with shrimp and planted tanks?
Yes, they are compatible with almost any other small fish or invertebrate and are a popular choice for planted and shrimp tanks.

Frank Lambert –
Added a group of 12 Corydoras Dwarf to my planted tank. They are very active and swim constantly throughout the day. The tank looks more lively now. Great for small community tanks with shrimp.
Heather Howard –
Kept them in a 10-gallon tank with neon tetras and cherry shrimp. They don’t bother the shrimp and swim well in the middle of the tank. Only issue is they need a group to feel comfortable.
Nicholas Clark –
The fish are tiny and very peaceful. I’ve had them for three months and they’ve adapted well to the planted environment. They swim in the water column, which is different from other Corydoras I’ve seen.