Fmecks are a race of extremely small aliens from the Men In Black series who are somewhat related to the famous Arquillians from both the series and film, like the Arquillians some Fmecks utilize human-sized robots that have a hollow "head" that can be opened up to reveal the tiny alien pilot.

Unlike the peaceful Arquillians, Fmecks are evil and warlike - making them enemies of MIB and galactic peace in general.