Which is the biggest single-celled organism?
Caulerpa taxifolia, a green algae and a species of seaweed that can reach 30 centimeters long, is believed to be the largest single-celled organism in the world. Its surface area is enhanced with a frond-like structure. It is coenocytic, meaning it is a single cell with multiple nuclei, making it like a multicellular organism but without the divisions between cells.