Hundreds of species of catfish feature in the aquarium hobby.
This is an attractive, interesting, hardy catfish that will often grow to be about 12" long in an aquarium.
The redtail catfish (Phractocephalus hemioliopterus), known as the cajaro in Venezuela, and the pirarara in Brazil, is an extremely large freshwater fish. Yet, despite its total lack of suitability for home aquariums, it is still regularly found for sale in pet stores. Its name originates from its distinctive reddish dorsal and caudal fins.
To the surprise of many non-fishkeepers and beginners in the hobby, the upside-down catfish (pictured at the top of this article) does exactly what its name suggests: it swims upside-down. One of the smaller and more peaceful members of its genus, the upside down-catfish is suitable for aquariums of at least 20 gallons (75L) and does well in most moderately peaceful communities. They are a popular choice for Central-/West-African biotope setups, so small cichlids from similar areas (like Kribensis cichlids) could make suitable tankmates.
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It is virtually unheard of for catfish to breed in the home aquarium.
The Leopard Catfish (Corydoras trilineatus) is frequently confused with the Corydoras julii. You can tell them apart by looking at the horizontal stripes. In the C. trilineatus they are larger. There are very similar aquarium care requirements between the two species.They are omnivorous and should go after all fish food that you place in the aquarium. Some feel that the irridescent shark should be given more carnivorous type rations as juveniles and to mix more greens into their diet as the get bigger. Aim for a varied diet of flake foods, frozen foods, algae wafers and catfish pellets.The Redtail Catfish (Phractocephalus hemioliopterus) can get up to around 50 inches (130 cm) or larger in size when fully grown! The more commonly seen sizes are around half that - 25 inches (65 cm) or so. They are considered fast growers and will outgrow 99 percent of home aquariums so it's best to not buy this catfish unless you have a large backyard pond to put them in. The redtail catfish can live for many, many years so putting one in a small tank that they can quickly outgrow is not a good idea at all. Whatever it wants. It will eat most any foods put into the tank. Feed them every couple of days or so catfish sticks, meaty pieces of fish. They are well known for swallowing smaller aquarium decorations. The Striped Raphael Catfish is a medium to large sized catfish that is very active. Being nocturnal, the Striped Raphael Catfish comes out mostly at night, though they are known for getting adjusted to daylight. They are native to the northern amazon rivers, and have not been known for breeding in the home aquarium.Probably the most well-known and popular type of aquarium catfish is the genus Corydoras, collectively known as Cory catfish or Cories. There are many different Corydoras species, ranging from the tiny pygmy Cory which is suitable for tanks of 10 gallons (38L) and up to larger species like the bronze Cory, which needs 30 gallons (114L) or more.