GrammonusGrammonus is a genus of viviparous brotula.SpeciesThere are currently 11 recognized species in this genus:Grammonus ater Grammonus claudei Grammonus diagrammus Grammonus longhursti Grammonus minutus J. G. Nielsen & Prokofiev, 2010Grammonus nagaredai J. E. Randall & Hughes, 2008Grammonus opisthodon J. L. B. Smith, 1934 Grammonus robustus H. M. Smith & Radcliffe, 1913Grammonus thielei J. G. Nielsen & Cohen, 2004Grammonus waikiki Grammonus yunokawai J. G. Nielsen, 2007