Brockius is a genus of labrisomid blennies from the waters of the eastern Pacific and the western Atlantic where they are associated with reefs and seaweed-covered rocks.
The species in the genus are:
The name Brockius was coined by Clark L. Hubbs as a subgenus of Labrisomus but has been raised to a genus in its own right.
The generic name honours the ichthyologist and herpetologist Vernon E. Brock (1912-1971) who collected the type of B. striatus.