A family of spherical or oval cyanobacteria (blue-green algae) that typically form colonies and are found in freshwater and marine environments.
From Greek 'chroos' (color) and 'kokkos' (berry/grain), with the Latin family suffix '-aceae'. Named for their distinctive colored, grain-like appearance when viewed under a microscope.
These microscopic organisms are literally living time capsules—some Chroococcaceae species have been producing Earth's oxygen for over 2 billion years, making them among the oldest and most successful life forms ever! They're still in your swimming pools and water tanks today.
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