A highly biological productive ocean surface appears chalky; what plankton is likely successful here?

Question

Quizplus · Accepted Answer

Coccolithophores are able to utilize brightly lit ocean surfaces like the Mediterranean. Their numbers can bloom, making the water appear chalky or milky. These plankton are capable of building seabed deposits of ooze, like that at the White Cliffs of Dover in England. Information can be found in the section Most Phytoplankton are Photosynthetic Autotrophs.

A Highly Biological Productive Ocean Surface Appears Chalky; What Plankton