Martin Dohrn / John Ruthven swimming in the Bioluminescence Bay in Vieques, Puerto Rico. Dinoflagellates create the bioluminescense when disturbed. Model released.

Albert Lleal / Dinoflagellate (Ceratium sp) from the mediterranean coast, Spain

Albert Lleal / Dinoflagellate (Ceratium sp) group, magnified 400x, Barcelona, Spain

Solvin Zankl / Dinoflagellates (Noctiluca miliaris) which cause glowing wakes of ships, captive.

Solvin Zankl / Planktonic dinoflagellates (Ceratium) from the North Sea, captive.

Albert Lleal / Dinoflagellate (Dinophysis sp) shell magnified 350x under electron microscope, Mediterranean Sea, Barcelona, Spain

Albert Lleal / Dinoflagellate (Gonyaulax sp) covered with chromatophores wich are useful for photosynthesis, Barcelona, Spain

Albert Lleal / Dinoflagellate (Coolia sp) from the mediterranean coast, Spain

Albert Lleal / Dinoflagellate (Alexandrium sp) from the mediterranean coast, Spain

Kevin Schafer / Red tide, and algal bloom of phytoplankton, Sea of Cortez, Mexico

Albert Lleal / Dinoflagellate (Ceratium sp) and salt crystals SEM close-up view at 120x magnification

Albert Lleal / Dinoflagellate (Ceratium sp) with large horn-like appendages on the head, Spain