tritonibacter tritonibacter tritonibacter is a gram-negative, heterotrophic and aerobic genus of bacteria from the family of rhodobacteraceae with one known species (tritonibacter horizontis). tritonibacter horizontis has been isolated from oil contaminated water from the deepwater horizon oil spill in the gulf of mexico. tritonibacter scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: tritonibacterklotz et al. 2018 type species tritonibacter horizontis species t. horizontis