Sunday #Plankton Factoid 🦠🦐
Next #zooplankton important to #paleooceanography with a long geological record are #Foramanifera. Like #Radiolaria forams are unicellular amoeboid protozoa, planktonic or benthic with spectacular shaped Tests made of mostly calcium carbonate with pores they exude pseudopodia to capture prey or uptake DOC. Some have symbiotic algae. Known for millenia, but their complicated life cycles, alternating haploid and diploid aren't well documented.
https://en.m.wikipedia.org/wiki/Foraminifera