They are a kind of unicellular protists which are found inhabiting both in freshwater and marine ecosystems.
These entities are also capable of bioluminescence as they generally produce a chemical compound which has the potential to generate light when they react.
This process is stimulated when dinoflagellates come into contact with any object, other organisms or even water movement by waves.
They can also glow due to a dip in temperature.
They use process of bioluminescence as defensive mechanism from the predators.
Noctiluca, Gonyaulax are the examples of dianoflagellates.