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6. Corydoras Catfish – The Amiable Clean-Up Crew:
Corydoras catfish, often simply called “cories,” are small, friendly bottom-dwellers that make excellent additions to many freshwater aquariums. They’re known for their armoured plates and playful behaviour. Corydoras are peaceful fish that do well in groups of their own kind and are excellent for community tanks. They help keep the tank clean by scavenging for leftover food on the substrate but still require regular feedings of sinking pellets or wafers.