Corydoras Catfish
Corydoras aeneus
🌍 Overview
Corydoras catfish are small, armored, bottom-dwelling fish native to the rivers and streams of South America. They are obligate shoaling fish, meaning they need the company of their own species to feel secure and behave naturally, and they spend much of the day actively foraging through soft substrate with sensitive barbels around their mouth. A unique adaptation lets them gulp air at the surface and absorb oxygen through their intestine, a backup system for the low-oxygen waters they evolved in.
📋 Quick Facts
Native Range
South America (Amazon Basin and surrounding river systems)
Natural Habitat
Slow-moving rivers, streams, and flooded forest with soft sediment
Adult Size
2-3 inches (5-7.5 cm)
Wild Diet
Insect larvae, worms, small crustaceans, and organic detritus
Wild Lifespan
5-10 years; up to 15 years with excellent care
Conservation Status
Least Concern (IUCN)
⚖️ Compare
Corydoras Catfish
Human
Adult Size
2-3 inches (5-7.5 cm)
5-6 feet (150-185 cm); ~135-200 lbs
Wild Lifespan
5-10 years; up to 15 years with excellent care
~73 years (global average)
Wild Diet
Insect larvae, worms, small crustaceans, and organic detritus
Omnivorous - eats just about anything
Native Range
South America (Amazon Basin and surrounding river systems)
Global - originated in Africa roughly 300,000 years ago
Natural Habitat
Slow-moving rivers, streams, and flooded forest with soft sediment
Everywhere from arctic tundra to tropical megacities
Conservation Status
Least Concern (IUCN)
Least Concern (8+ billion and counting)
🧠 Test Yourself
What's the Corydoras Catfish's native range?
🤩 Fun Facts
🐱 Headbutt Means Love
When your cat headbutts you, it's called 'bunting' and it means they love and trust you! They have scent glands on their forehead, and bunting is their way of marking you as 'theirs.'
🐱 Meow is Just for Us
Cats only meow at humans, not at other cats. They invented the meow specifically to communicate with people, and each cat develops its own unique vocabulary.
🐱 Healing Purr
A cat's purr vibrates at 25 to 150 Hz, a frequency known to promote bone healing and reduce stress, for both the cat and the human nearby!
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🤓 Did You Know?
Corydoras catfish can breathe atmospheric air by gulping it at the surface and absorbing oxygen through their intestine - a backup adaptation for the low-oxygen waters they evolved in. This means an occasional dash to the surface for a quick gulp of air is completely normal behavior, not a sign of a sick or distressed fish.
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