Stephen Dalton / Carchesium, a colonial Protozoan found in pond water. UK, November.

Solvin Zankl / Foraminifera (Archaias angulatus) from the calcareous sand from the Bahamas, USA. The arrangement of the inner chambers is evident from the stripe pattern. This unicellular organism is common to the s...

Solvin Zankl / Threads of protoplasma by foraminifera (Sagenina frondescens) on a piece of sea shell with agglutinated sand particles from Raja Ampat, Indonesia. Digital focus stacking image

David Shale / Deepsea Foraminifera (Discospirina tenuinissima) from mid-Atlantic ridge, June 2010

Kim Taylor / Amoeba proteus among pond debris, UK.