Gramma (fish)Gramma is a genus of fishes native to tropical waters of the western Atlantic Ocean and the Caribbean Sea.DescriptionMembers of the genus Gramma are brightly colored, generally with two different colors. They measure, depending on the species, between.SpeciesThere are currently five recognized species in this genus:Gramma brasiliensis I. Sazima, Gasparini & R. L. Moura, 1998 Gramma dejongi Victor & J. E. Randall, 2010 Gramma linki Starck & P. L. Colin, 1978 Gramma loreto Poey, 1868 Gramma melacara J. E. Böhlke & J. E. Randall, 1963