Ptychochromoides katria Reinthal & Stiassny, 1997 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,[1] that was formerly included in the genus Ptychochromoides.

[2] The only other monotypic cichlid genus in Madagascar is Oxylapia, and it is restricted to the same region as Katria.

[3] In 2010, the Nosivolo River was designated as a Ramsar Site.

[4] The Katria reaches about 13 centimetres (5.1 in) in length.