Acanthemblemaria stephensi, the Malpelo barnacle blenny, is a species of chaenopsid blenny found in coral reefs around Malpelo Island, in the eastern Pacific ocean.

It can reach a maximum total length of 5 cm (2.0 in).

This species feeds primarily on zooplankton.

[2] The specific name honours the environmental biologist John S. Stephens Jr.[3]

This Chaenopsidae article is a stub.