Lawnmower Blenny

Snapshot: Also known as the Algae Blenny. It has subdued shades of tan, green, or gray, with bold dark stripes crisscrossing its body. These fish are the masters of camouflage. They have an oversized head, complete with (what looks like) a prominent brow.
 
Other tidbits: Can grow up to 14cm or so. Found in coral-rich areas of the tropical waters of the Indo-Pacific region and the Red Sea.
 
Bare bones must know: Live-rock fish-only system, or reef aquarium with care. Mature or well established aquarium only.