This comical looking fish is a fun addition to any tank, and even I couldn't resist its charms when it posed for my lens. Lawnmower Blennies do eat algae, but I've watched this fish swim up and try to take a chomp of Spock, literally trying to latch onto her body as if there was algae to consume. Of course, Spock was furious, turned hard and fast sending the blenny into a hasty retreat. She'd pace the tank a couple of times, basically muttering to herself "As if I was a moss-covered wall... tsk!"