Katria is a genus of freshwater fish in the cichlid family. It contains the single species Katria katria, a vulnerable species from the Mangoro and Nosivolo Rivers in east-central Madagascar, that was formerly included in the genus Ptychochromoides.[1] The only other monotypic cichlid genus in Madagascar is Oxylapia, and it is restricted to the same region as Katria.[2] In 2010, the Nosivolo River was designated as a Ramsar Site.[3] The Katria reaches about 13cm (05inches) in length.