gramella flava gramella flava gramella flava is a gram-negative, aerobic and motile bacterium from the genus of gramella which has been isolated from seawater. gramella flava scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: gramella species: g. flava binomial name gramella flavaliu et al. 2014 type strain jlt2011