The Lawnmower Blenny, also called the Jeweled Blenny, or the Algae Blenny, is a very popular algae eating blenny. These fish have a long slender body with a long dorsal fin that extends the length of their body. They are usually tan and white in color and love to perch on rockwork. The Lawnmower is aptly named for its ability to mow down hair algae. These fish have tons of personality. They make an excellent addition to any reef tank. They should be offered algae sheets on a regular basis if regular algae growth is not available.