Sun, 03 May 2026 08:45:35 +0000

Don’t Ignore This Crazy Behavior in Pygmy Corydoras – It Might Change Your Aquarium Forever If you’re a dedicated aquarist, especially one focused on small, vibrant freshwater setups, then few fish inspire as much fascination as the Pygmy Corydoras (Corydoras pygmaeus). These tiny, tank-presenting catfish areopping favorites among hobbyists for their energetic schooling behavior, striking coloration, and algae-scraping efficiency. But one behavior has puzzled and delighted fishkeepers more than most: their seemingly “crazy”—and remarkably dynamic—social and locomotive antics. ### Why Pygmy Corydoras Stand Out in Aquariums Pygmy Corydoras are among the smallest corydoras species, typically growing just 0.8–1 inch (2–2.5 cm) in length. Vibrant yellow-orange bodies with black dorsolateral stripes make them a standout in any community tank. But beyond their appearance, it’s their lively, coordinated schooling behavior that truly captivates experienced keepers.