Petroscirtes thepassii, the Thepas' sabretooth blenny or the Thepas' fangblenny, is a species of combtooth blenny found in the western central Pacific ocean.

This species reaches a length of 5.9 centimetres (2.3 in) SL.

[2] The specific name of this blenny honours the collector of the type, the military surgeon A.H.

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