This green bubble is one enormous cell.

Valonia ventricosa, a kind of alga, can grow to the size of a marble and beyond. Inside its single cell are many nuclei.

Something you might mistake for a tiny sea marble is biology on an unexpected scale.

This green bubble is one enormous cell

A glossy green Valonia ventricosa bubble, a single large algal cell

A glossy green Valonia ventricosa bubble, a single large algal cell — Haplochromis

A close photograph of a sea pearl’s surface with other small organisms growing on it

This green bubble is one enormous cell

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