Microcotyle tanago is a species of monogenean, parasitic on the gills of a marine fish.

It belongs to the family Microcotylidae.

[1] Microcotyle tanago was first described by Yamaguti in 1940 based on a single mature specimen.

[1] Caballero y Caballero and Bravo-Hollis erected the genus Paramicrocotyle to describe Paramicrocotyle tampicensis and Paramicrocotyle atriobursata off Mexico, they placed within this genus 16 species previously assigned to the genus Microcotyle[3] including M.

[2] It was returned to the genus Microcotyle by Mamaev who considered Paramicrocotyle a junior subjective synonym of Microcotyle.