Alcanivoracaceae Balneatrichaceae Endozoicomonadaceae Hahellaceae[1] Halomonadaceae Kangiellaceae Litoricolaceae Oceanospirillaceae Oleiphilaceae Saccharospirillaceae The Oceanospirillales are an order of Pseudomonadota with ten families.

[2] Bacteria in the Oceanospirillales are metabolically and morphologically diverse, with some able to grow in the presence of oxygen and others requiring an anaerobic environment.

[3] Bacteria in the Oceanospirillales include hydrocarbon-degrading groups such as Oleispira antarctica, Thalassolituus oleivorans, and Oleiphilus messinensis, which were found in the indigenous microbial community in deep waters after the Deepwater Horizon oil spill in 2010.

[4] They are also common members of bacterial communities in the water column of the hadal zone of ocean trenches.

[5] The order Oceanospirillales was first described in 2005 in the second edition of Bergey's Manual of Systematic Bacteriology, consisting of six families and with the type genus of Oceanospirillum.