freshphotons:

scienceisbeauty:

Gephyrocapsa oceanica

Coccolithophores (also called coccolithophorids) are single-celled algae, protists and phytoplankton belonging to the division haptophytes. They are distinguished by special calcium carbonate plates (or scales) of uncertain function called coccoliths (calcareous nanoplankton), which are important microfossils. Coccolithophores are almost exclusively marine and are found in large numbers throughout the surface euphotic zone of the ocean.

Source: Wikipedia

If I did not go to med school, most probably I’m now counting phytoplankton.