Figure 5
From: Influence of surface ocean density on planktonic foraminifera calcification

3D rendering of a G. bulloides test from the computed tomographic data illustrating (a) Vforam and (b) the equal action in seawater of the opposing forces of its weight (W) and the ocean’s buoyancy force (A) in order for hydrostatic equilibrium to be attained and for the organism to attain neutral buoyancy at a certain depth.