|A 4 inch wide single cell protozoa living on the ocean floor. Related|
species can be twice this size.
This cell is a xenophyophores from the western Pacific.
They are a single cell with a single nucleus.
However they are pretty disgusting too. They are scavengers who root around in the mud looking for food. They exude mucus and the mucus entraps articles from around them, including their own feces.
The feces get infected with bacteria, and then the xenophyophores eat that.