Ecsenius oculus, known commonly in Micronesia as the Ocular blenny and as the Coral blenny on Christmas Island, is a species of combtooth blenny in the genus Ecsenius. It is found in coral reefs in the western Pacific ocean. It can reach a maximum length of 7 centimetres. Blennies in this species feed primarily off of plants, including benthic algae and weeds, and are commercial aquarium fish.