Ecsenius polystictus, known commonly as the dotted coralblenny or Andaman combtooth-blenny, is a species of combtooth blenny in the genus Ecsenius.

It is found in the eastern Indian Ocean, around Indonesia.

It can reach a maximum length of 4 centimetres.

Blennies in this species feed primarily off of plants, including benthic algae and weeds.

This Blenniidae article is a stub.