筛口双线鳚（学名：Enneapterygius etheostoma），又称紧口罗氏三线鳚，为辐鳍鱼纲鲈形目三鳍鳚科的其中一种。

本鱼分布于西北太平洋区，包括日本南部及**海域。

Enneapterygius etheostomus is a species of triplefin blenny in the genus Enneapterygius. It is a temperate blenny known to inhabit rocky shores in the northwestern Pacific Ocean, and swims at a depth range of 0-21 metres. It has been described from Japan, China, Korea, Hong Kong, ******, and Vietnam. Male E. etheostomus can reach a maximum length of 5.5 centimetres. Both juveniles and adults of the species are known to feed on benthic algae.