Tatia is a genus of driftwood (woodcat) catfish in the family Auchenipteridae, found across the Amazon and Orinoco basins and the Guiana Shield, with atlas records from Brazil, Colombia, Peru, Venezuela, Ecuador, Guyana, Suriname, and French Guiana. The 17 species in the atlas span a wide size range, from about 2.3 to nearly 6.5 in, and share the auchenipterid build: a smooth, scaleless, somewhat elongated body, an adipose fin, and long barbels suited to a nocturnal, mostly mid-water lifestyle among submerged wood and leaf litter. Like other driftwood catfish, Tatia species are internally fertilizing — males have a modified anal fin used to transfer sperm to females, an unusual reproductive strategy among catfish.
Several Tatia species, including Tatia brunnea and T. gyrinus (traded as the ninja or dwarf driftwood catfish), have a following in the aquarium hobby as small, peaceful, nocturnal catfish suited to well-decorated community tanks with plenty of wood and cover. They are generally easy keepers once established but shy and secretive, spending daylight hours hidden and becoming active only after lights-out, which limits how often they are seen even in tanks that house them successfully. Most assessed species in the atlas are Least Concern, and the genus as a whole is not considered a conservation priority, though several species remain Not Evaluated or Data Deficient across its wide Amazonian range.