: a genus of marine and freshwater flagellates (order Dinoflagellata) certain species of which form an important part of the plankton of northern seas.

What is the function of Ceratium?

Ceratium dinoflagellates have a unique adaptation that allows them to store compounds in a vacuole that they can use for growth when nutrients become unavailable. They are also known to move actively in the water column to receive maximum sunlight and nutrients for growth.

Why are Ceratium important?

In general, though, Ceratium are necessary components of their habitats. They serve not just as nutrients for larger organisms, but they keeps smaller organisms in check through predation.