A unique and heavily armored catfish found throughout the Amazon and its tributaries, the Irwin’s Catfish or Giant Raphael Catfish is typically a gentle giant in the aquarium, ignoring most fish and being well protected from even the most aggressive tankmates. In the wild, their diet largely consists of aquatic snails, crustaceans, fruit and vegetation, but they will readily accept almost any sinking food. A great scavenger to help manage leftover food in large cichlid or predatory fish displays, they do grow to a huge adult size and will require a tank of 180 gallons at the bare minimum.