chaetoceros is marine planktonic diatoms under microscope view

alga anatomy animal art auxospores background biology blooms cell centric chaetoceros colonial diatom diatoms dinophyceae fish food frustule genus heterotrophic isolated largest light lipids marine micro microbiology microorganism microscope microscopic microscopy old organism photosynthetic phytoplankton plankton planktonic plates protists retro science sea silica single sparkle spines spores under water web