Corydoras are a freshwater fish species mostly known as peaceful and charming scavengers.
They belong to Corydoradinae subfamily, which is part of a large Callichthyidae family.
Let’s take a look at their place as a genus within scientific classification.
Many types of Corydoras
There are many different types of corydoras.
Some estimates point to more than 142 species around the world.
Additionally, many more variations (several hundred is a rough estimate) exist and are kept by aquarists.
However, great majorities of species are not scientifically classified.
Corydoras are community fish and they are not aggressive or territorial by any means.
They dwell at the bottom of the tank as they are bottom feeding scavengers.
They generally prefer warmer and soft water with slightly acidic pH levels.
However, the water temperature they thrive in varies greatly depending on which particular species is held.
Here are some of the more prominent types of corydoras:
Bronze Cory (Corydoras aeneus)
Bronze cory is probably the most popular and most kept of all cory types.
It’s basically just one color (bronze) variation of the species known as the green cory.
They are small, lively, and peaceful whose native habitat is in the slow moving, muddy waters of South America.
In an aquarium environment, they reach a maximum of 3 inches.
The preferable water temperature for this type of Cory is anywhere between 72-79⁰ Fahrenheit and slightly acidic with pH ranging from 5.8 to 7.0.
Panda Cory (Corydoras panda)
Panda cory is another popular species from the corydoras genus.
They are native to parts of the Amazon in Peru and also found in Ecuador.
Their name comes from the black markings around their eyes and black spots located at the rear.
Being one of the smaller corydoras, they only grow 2 inches long in an aquarium environment.
They are highly social and often form tight schools with species of their own kind, but also with other bottom dwelling species.
Their ideal water temperature is from 68-77⁰ Fahrenheit.
The water pH they feel most comfortable is anywhere from 6.0 to 7.0.
Peppered Cory (Corydoras paleatus)
Peppered cory was one of the first tank-bred cory species.
Almost all of the fish sold worldwide today are farm-raised.
Being peaceful scavengers, they are constantly swimming around the bottom of the aquarium in search for food.
They get along with virtually all other fish species, which makes them a perfect fit for community aquariums.
Their growth depends on the sex of the fish; male peppered cory can grow to 2.5 inches while females get a little longer – 3 inches at maximum.
The preferred temperature for this species is between 72-78⁰ Fahrenheit.
Water pH should be slightly acidic with pH values between 6.0 and 7.0.
Julii Cory (Corydoras julii)
This species of Cory is native to the lower Amazon region, primarily in the rivers of Brazil.
They are often confused with their other relatives from the upper Amazon areas, the three stripe Cory; the main difference is Julii cory spots aren’t directly connected to each other, whereas the three stripe cory’s spots are more linear and are connected into larger chains.
Their body is somewhere between silver and gray while their spots are mostly black.
Just like all of their cousins, they are peaceful bottom dwelling scavengers.
A full-grown Julii Cory is about 2.5 inches long.
The temperature they thrive in is in the range of 73-79⁰ Fahrenheit.
They prefer a somewhat neutral pH between 6.5 and 7.8 should suit them just fine.
Pigmy Cory (Corydoras pygmaeus)
This is one of the most unique Cory species around, being one of the smallest within the subfamily.
They only get to about 1 inch in size in an aquarium environment.
The other unique thing about them is their depth preference.
Unlike most other corydoras, they are mid-water swimmers as they do not dwell at the bottom of the tank.
Instead, they tend to rest on plants inside the aquarium.
The temperature that suits these miniature pets best is anywhere between 70-78⁰ Fahrenheit.
They prefer near-neutral water pH in range from 6.5 to 7.5.
Bandit Cory (Corydoras metae)
Bandit corydoras are one of the oldest species of corydoras kept in an aquarium, originally found in 1914.
They are named after the river Rio Meta in Columbia where they were first found.
They are called “bandit” because of the black spots around their eyes resembling the mask often worn by bandits.
In contrast to their name, they are peaceful, schooling species and only grow 2 inches long.
One thing to have in mind when keeping them is they are more sensitive to variations in water temperature.
Their ideal temperature is in range from 72-79⁰ Fahrenheit and they prefer slightly acidic to neutral water pH between 6.5 and 7.0.
Corys are a good choice
Whichever Cory from the wide variety of corydoras you choose, you will not make a mistake.
They are hardy, interesting, and beyond everything else – easy to keep.
These feats are among the main reasons these species are so popular, both with novice and experienced aquarists.
Good luck and happy fish keeping!
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