STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Plankton cell wall. Coloured scanning electron micrograph (SEM) of the geometrical plates making up the mineralised cell wall of a planktonic alga (Coronosphaera mediterranea). This is a type of alga known as a coccolithophorid, meaning that during its resting phase it produces these plates of calcium carbonate to form a shell around its single cell. It also has a motile phase, when it uses flagella to move. Such algae are found in the sea, forming huge algal blooms when conditions are right.
Model release not required. Property release not required.