Does anyone know what that circle inside of a ring could be?
When you look at the picture the discussion title is pretty self-explanatory.
😃 Hi @popcornrulez
Yes, we do know what it is! It is a #Protist.
Protists are a large and diverse group of eukaryotic organisms. They vary in size, shapes and opacity. Some are spiky made of a mineral skeleton, some are single, other create colonies...
We do classify only some single Radiolarians (the shiny opaque round guys with a transparent halo around)
or Radiolarian colonies (ribbon like shapes made of little marbles with a transparent halo around).
They do belong under Protists too. But all the other protists, like the one in this image, shall be ignored since we have no category for them 😃. They are very common so there's no need to tag them in the comments either since you would comment almost every image (at least the ones from the California location).
Hope it is clearer to you!