Listeria aquatica is a Gram-positive, facultatively anaerobic, nonmotile, non-spore-forming rod-shaped species of bacteria.

It was discovered from running water in Florida, and was first described in 2014.

Its name comes from Latin, "found in water, aquatic".

It is also the only nonmotile Listeria that can ferment D-tagatose.

This bacilli-related article is a stub.