Corydoras pygmaeus, commonly known as the pygmy cory, is among the smallest members of the armored catfish family. First scientifically described by Knaack in 1966, this diminutive species quickly gained popularity among aquarists for its peaceful temperament and compact size. In my experience, the pygmy cory makes an excellent choice for nano aquariums and community tanks with other gentle species.
The panda cory (Corydoras panda) stands out as one of the most charming armored catfish species in the aquarium hobby. This small bottom-dweller earned its name from distinctive markings resembling a giant panda: a black patch across the eyes like a mask, a dark spot at the tail base, and contrasting dorsal fin against a light pink or cream body. In nature, Corydoras panda inhabits the upper Amazon basin, primarily in rivers of Peru and Ecuador, especially the Ucayali River system, where it favors areas with soft acidic water, sandy substrate, and gentle current.
The peppered cory (Corydoras paleatus) ranks among the most beginner-friendly aquarium fish available today. This armored catfish species has graced home aquariums for over a century, earning a well-deserved reputation for hardiness and peaceful temperament. In my experience, this fish serves as an excellent introduction to bottom-dwelling species—it tolerates common beginner mistakes while remaining genuinely engaging to observe.
The glass catfish (Kryptopterus vitreolus) stands out as one of the most remarkable aquarium fish, offering a literal window into the workings of a living organism. Its nearly transparent body has earned it nicknames like “ghost fish” or “phantom catfish.” You can see right through the fish to observe internal organs, skeletal structure, and even the aquarium background behind it. The only opaque part is a silvery sac just behind the head that houses vital organs.
The cuckoo catfish is one of the most fascinating members of the featherfin catfish family. This species earned its common name from a remarkable reproductive strategy that mirrors the brood parasitism of cuckoo birds. In the wild, these fish are found exclusively in Lake Tanganyika in East Africa, where they’ve evolved alongside mouthbrooding cichlids.
The upside-down catfish (Synodontis nigriventris David, 1936) is one of the most recognisable and entertaining species in the family Mochokidae. It is also the smallest member of the Synodontis genus, making it ideal for moderately sized home aquariums. Native to the Congo River basin in Central Africa, this species inhabits slow-moving tributaries with dense vegetation, submerged roots and plenty of driftwood.
The Hoplo Catfish, known scientifically as Hoplosternum thoracatum (Valenciennes, 1840), is one of the most fascinating armoured catfish in the hobby. A member of the family Callichthyidae, it stands out not only for its robust, plated body but also for a remarkable physiological trait: the ability to breathe atmospheric air through a specialised intestinal respiratory organ. In my years of fishkeeping experience, this species has consistently proven to be both rewarding and surprisingly engaging to observe.
The bicolor banjo catfish is a remarkable bottom-dwelling species that amazes aquarists with its exceptional camouflage abilities. This unusual aquarium inhabitant has earned the nickname “driftwood catfish” thanks to its unique cryptic coloration and habit of freezing motionless on the substrate, becoming virtually indistinguishable from a piece of bark.
The bristlenose pleco (Ancistrus dolichopterus) is a member of the armored catfish family (Loricariidae), native to South America—specifically the Amazon River basin and other fast-flowing waterways. In their natural habitat, bristlenose plecos inhabit the waters of the Amazon basin, including rivers in Brazil, Peru, Guyana, Suriname, and Trinidad, preferring mountainous, fast-flowing, shallow rivers and tributaries.