system
Given the following post, respond as if you're commenting on Reddit:
human
What was the biggest cell ever existed on planet Earth?

Not necessarily a unicellular creature, it might even be an egg or a plant/animal with really big cells.
gpt
It depends on what you mean by biggest.

*Caulerpa Taxifolia* is a single celled green algae with multiple nuclei, with a connecting root that can reach 3 meters and leaves that can go up to 30 cm. In terms of lenght, this is the biggest.

 *Syringammina fragilissima* is a single cell organism that can reach up to 20 cm diameter, it has a ball-like structure made of countless interconnecting tubes. It is then the biggest cell in terms of diameter.

Ostrich eggs are the biggest in terms of volume and weight, they are 10-15 cm across and have no empty space in their volume.