Robuta

https://en.wikipedia.org/wiki/Radiolaria
radiolariawikipedia
https://www.sciencedaily.com/releases/2016/08/160809095259.htm
Tiny radiolarians by the name of Sticholonche zanclea have complex exoskeletons built from silica or strontium sulfate and can take on a myriad of strange...
from thewonderful worldnewinsightradiolaria