This photograph from Widipedia Commons was taken by “Bidgee.”
If we assume that dinoflagellates use energy to make light (the “energy use” idea) then this is a photograph of a huge number of the tiny organisms flashing because of a false alarm. They are flashing because of the currents in the breaking waves, rather than because of currents caused by one of their potential consumers.
This photo from Wikimedia Commons was taken by Niels Olsen.
If we consider the ratchet idea, then these organisms are assimilating energy, not wasting it on a false alarm.
Bioluminescent dinoflagellates are kinetitrophic organisms.