idiomarinaceae idiomarinaceae idiomarinaceae is a gram-negative and mesophilic family in the order of alteromonadales. bacteria of the family idiomarinaceae occur in saline environments. idiomarinaceae scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: idiomarinaceaeivanova et al. 2004 genera idiomarina aliidiomarina