Stephanie SammannofReal Scienceexamined the unique biology of the cuttlefish, noting its mesmerizing strobing bioluminescence, remarkable intelligence, and singular buoyancy.

A major component of getting around the ocean is having some kind of buoyancy system cuttlefish have an utterly unique buoyancy mechanism the cuddle bone. cuttlebone has high porosity and high permeability,meaning it can resist changes in shape when being acted on by a physical force.

Originally posted here:

The Uniquely Buoyant Biology of the Cuttlefish - Laughing Squid