Introduction The world of freshwater aquarium fish is as diverse as it is captivating, and among its hidden gems lies Dianema urostriatum, commonly known as the flag-tailed catfish. This remarkable member of the family Callichthyidae is treasured by aquarists for its intriguing appearance, peaceful temperament, and adaptability to a home aquarium. Native to the freshwater rivers of South America, Dianema urostriatum brings a touch of the Amazon’s mystique to tank enthusiasts worldwide. Dianema urostriatum ( shutterstock.com) Taxonomy and Classification Scientific Name: Dianema urostriatum Common Names: Flag-tailed catfish, Striped-tail catfish, Striped tail Dianema Family: Callichthyidae Order: Siluriformes Genus: Dianema Species: urostriatum Within the catfish order Siluriformes, the family Callichthyidae is known for its armored appearance and includes many popular aquarium species. The genus Dianema contains only two recognized species: Dianema urostriatum and Dianema longibarbis, b...