Vibrio harveyi is a species of marine bioluminescent vibrio species almost ecologically identical to Vibrio fischeri. See that article for a more in detail analysis of its role in the environment and in symbiosis with marine life. V. harveyi may be a more common cause of luminous vibriosis in commercially farmed marine invertebrates.

Based on samples taken by vessels, Vibrio harveyi is thought to be the cause of the Milky seas effect, in which, during the night, a uniform white glow is emitted from the seawater. Some glows can cover nearly 6,000 square miles.

Proteobacteria | Bioluminescent organisms