Yeah, but the cell of such single-celled organisms are usually round or in one segment. This one looks like it has several segments, and still be a single cell,

Yeah, but the cell of such single-celled organisms are usually round or in one segment. This one looks like it has several segments, and still be a single cell, which is fascinating. Perhaps it is blurring the line between single cellular and multi cellular a bit, which might be the point that the article was trying to make.