Petroscirtes breviceps, the striped poison-fang blenny mimic, striped fangblenny mimic, short-head sabretooth blenny, short-headed blenny, sabretooth blenny, or the black-banded blenny, is a species of combtooth blenny found in coral reefs in the western Pacific and Indian Ocean.

This species reaches a length of 11 centimetres (4.3 in) SL.

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