Malacoctenus boehlkei, the Diamond blenny, is a species of labrisomid blenny native to the central western Atlantic Ocean and the Caribbean Sea where it is an inhabitant of coral reefs at depths of from . This species can reach a length of TL. The specific name honour the ichthyologist James E. Böhlke (1930âÂÂ1982), of the Academy of Natural Sciences of Philadelphia.