Another idea is that Jupiter didn't grow from the bottom up, but from the top down: the disk itself collapsed in several places to form huge, distended clumps.
The fish's brain sends a signal through its nervous system to the electric organ, which is filled with stacks of hundreds or thousands of disc-shaped cells called electrocytes.
Hemoglobin gives erythrocytes their red color. Erythrocytes are small, disk-shaped cells with no nucleus. This shape maximizes the surface area available for absorption of oxygen and carbon dioxide.
Let's cut to the chase: the Milky Way galaxy is a vast, flat, disk-shaped collection of gas, dust, and stars — a sprawling megalopolis that's a mind-crushing 100,000 light years across and several thousand light years thick.