The Yellow Tang - Zebrasoma flavescens - is one of the most recognizable saltwater fish in our hobby, probably second only to the clown fish. Yellow Tangs are beautiful herbivores, foraging for food all day long in nature. While diving in Hawaii, I was able to observe hundreds swimming in and around the reefs. While there have been concerns in recent years that we may be harvesting them excessively, the research conducted in 2012 disproves such allegations. I added two to my reef in 2011. Several times each week, I make it a point to clip half a sheet of nori in the tank for my tangs to feast from. Tangs eat frozen, pellet, flake and sheet algae, and I've observed them eating smashed banana as well. In Europe, some hobbyists offer butter lettuce (what we call Boston Lettuce) to their herbivores, and some briefly blanch brocolli for the occasional treat here in the U.S.A.