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

The haptor bears 40 clamps, arranged as two closely set rows, one on each side.

The digestive organs include an anterior, terminal mouth, a pharynx, and a posterior intestine with two lateral branches.

[1] The specific name otrynteri is derived from the generic name of the host species Otrynter caprinus.

[1] The type-host and only recorded host of Microcotyle otrynteri is Otrynter caprinus (Sparidae ).