Meiacanthus atrodorsalis, the forktail blenny, is a species of combtooth blenny found in coral reefs in the western Pacific ocean. This species grows to a length of 11cm (04inches) TL. This venomous species can also be found in the aquarium trade. It is also known as the eyelash harptail-blenny, poison-fang blenny or the yellowtail poison-fang blenny.