Ornate Corydoras
Corydoras ornatus
A long-lived Tapajós bottom-dweller that thrives in sociable, peaceful groups.

About
Found in the lower Tapajós River basin of Brazil, this ornate corydoras, known scientifically as Corydoras ornatus, is a solidly built little catfish that sits on the larger end of the Corydoras spectrum. It has the typical armored body and whiskered face that define the genus, and while source notes keep the description brief, it earns its species name with a noticeably attractive pattern. One of the more unusual traits in this group is facultative air-breathing. These fish will periodically dart to the surface to gulp air, which is completely normal behavior rather than a sign of poor water quality. Just make sure there's enough clearance between the waterline and your hood so they don't knock themselves on the way up. Like all corydoras, this species is genuinely unhappy in small numbers. A group of six or more is the practical minimum if you want to see confident, active fish rather than nervous ones hiding in corners. They're a peaceful addition to community setups alongside small characins, dwarf cichlids, and similar easy-going species, though anything large or boisterous will stress them out. Captive breeding is undocumented for this species specifically, but standard corydoras methods, cool water changes, a higher male-to-female ratio, and varied conditioning foods, are a reasonable starting point. With lifespans potentially reaching 20-plus years, this is a genuinely long-term commitment.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Ornate Corydoras
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Ornate Corydoras get?
- The Ornate Corydoras reaches about 1–3" as an adult.
- What size tank does the Ornate Corydoras need?
- A minimum of 19 gallons is recommended for the Ornate Corydoras, with more room needed for a proper group.
- What water parameters does the Ornate Corydoras need?
- The Ornate Corydoras does best with a temperature of 73–79°F, a pH of 6–8, hardness around 2–25 dGH.
- Is the Ornate Corydoras aggressive?
- The Ornate Corydoras is generally peaceful and suits a community tank with similarly calm tankmates.
- What does the Ornate Corydoras eat?
- The Ornate Corydoras is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
- How long does the Ornate Corydoras live?
- With good care, the Ornate Corydoras typically lives 15-25 years.