pneumatisation is when the devolopment of a whales brain interactes with a poison slug
Pneumatisation refers to the process by which certain bones, particularly in the skull, develop air-filled cavities or sinuses. This process helps reduce the weight of the bones, enhance resonance, and improve the functioning of the respiratory system. Pneumatisation is most notably observed in the maxillary, frontal, ethmoid, and sphenoid bones. It plays a role in various physiological functions, including voice modulation and protection against infection.
it makes their bodies lighter so they can still fly. this is called pneumatisation.