鳚亚目（学名：Blennioidei）为辐鳍鱼纲鲈形目的其中一个亚目。

鳚亚目下分6科：

• 三鳍鳚科(Tripterygiidae)
• 柄眼鱼科(Dactyloscopidae)
• 鳚科(Blenniidae)
• 矶鳚科(Clinidae)
• 新矶鳚科(Labrisomidae)
• 旗鳚科(Chaenopsidae)

The common name blenny (deriving from the Greek ἡ βλέννα and τό βλέννος, mucus, slime) is ambiguous at best, as it has been applied to several families of perciform marine, brackish, and some freshwater fishes all sharing similar morphology and behaviour. Six families are considered "true blennies", all grouped together under the suborder Blennioidei; its members are referred to as blennioids. About 833 species are found in 130 genera within the suborder.