Praealticus poptae, the Marianas rockskipper, is a species of combtooth blenny found in coral reefs in the western central Pacific ocean, around the Mariana Islands. This species grows to a length of 4.7cm (01.9inches) SL. The specific name honours the Dutch ichthyologist and curator Canna Maria Louise Popta (1860-1929) of the Rijksmuseum van Natuurlijke Historie in Leiden.[1]