Aplochiton marinus is a species of ray-finned fish in the family Galaxiidae.

It is an amphidromous fish migrating between ocean and fresh water.

[2] A. marinus is endemic to Chile.

[2] The species has previously been synonymised with A. taeniatus[1] but was confirmed as a full, valid species in 2013.

This Galaxiidae-related article is a stub.