Coloured scanning electron micrograph (SEM) of marine phytoplankton haptophyte (Isochrysis galbana). Isochrysis galbana is a microalga originally from the chrysophyte algal group. It is now classified in a new phylum of algae called haptophytes (Prymnesiophyta or Haptophyta). It is a small round to ovoid cell that has two flagella for locomotion. It was discovered to have high lipid content and thus a good food source for various bivalve larvae. It is now widely cultured for use in the bivalve and other aquaculture industry. Magnification: x2,200 when shortest axis printed at 25 millimetres.
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